An example of a kind, but not smart person: Ralph Wiggum.
An example of a smart, but not kind: Comic Book Guy?
From these two, I'd prefer dealing with Ralph. CBG will kill your nerves in 5 minutes with his endless sarcasm.

Another example of a kind, but not too smart person: Marge.
Smart, but not always kind: Lindsay.
From these two, I also prefer the first. Te reason is obvious

The question #1 is: do you agree with such a "classification"? If so, where your personal preferences are?
The question #2 is: where is Lisa?

Can't say I completely agree with such classification. Frink, for example, is so smart, but not very sarcastic and it's possible to communicate with him kindly; Skinner rather smart, but pretty kind too, Willie is stupid, but not kind, Moe isn't smart, but not kind too, Agnes isn't smart but more disgusting than CBG. Intellect can't describe person completely, and it's very hard too choose, knowing only these 2 person's strains. It depends - when you need just friend, simply to communicate with - of course kind person is better. But if you need to communicate for some other purpose - some collaborate business, for example, it'll be easier to understand each other with kind person, but maybe smart snob will be more useful. And also it depends from person's mood - sometimes even CBG could be not so sarcastic.

Kindness is very important -  from all women in Springfield I like Marge the most just because she is so kind and caring, but I think that angriness of other women comes not only from intelligence, but also from loneliness, problems and work and so on, and so on.
And I don't think Lisa is snob or going to became it just because she is smart. She could be kind sometimes, and sometimes she could be cruel, and there are many reasons for it. And she treat most people with respect, no matter how smart they are, if they have some other good sides.

GeorgeHarrison
Partially agreed, but some smart people could be very selfish or just use all power of their brains to their own purposes, without caring much about the others. Lisa often thinks about worldwide problems, and every imperfection of life hurt her. But CBG, Frink and Lindsay don't care Maybe "ignorance is bliss" right for young people only...

About Ralph - he is my favourite character and I like him as he is, he is so kind and sincere, but at the same time: no one want make friends with him, and when he'll grow up, it'll be hard for him to find his way in this life, especially without his father. Many people like "coolness" and success, not such qualities as he has :/

DagdaVacation
What is ideal of kindness then? Even Marge and Lisa threw things in other people and had a quarrels and offended other people. Frink helps Lisa sometimes, and I can't remember that he'd done something bad. Yeah, it's not his obvious merit, but in all Springfield only Marge can be definited as more or less constantly kind - every day so maternally caring  made her kindness her dominant strain, easy to see. So, it's anyway hard to relate kindness and intelligence in this case, cause no one from Springfield have both these qualities as dominant.

I suppose, it's possible to normally and more or less friendly communicate with every citizen except CBG, Agnes, Lindsay, Cookie Kwan, Quimby, Burns and Mafia members (oh, not so short list as it supposed to be And also I don't like Martin ), so others have normal balance between intelligence and kindness.

Luckily, my fiance is both, so I don't have to choose.  I've always been attracted to guys who I feel are smarter than me in some ways, or creative in diffrerent ways.  If there is no kindness however, no dice.  I'd rather be with a guy who is less self-educated, than with a genius who is a total jerk.
I have a different way of looking at people's intelligence, though.  There are many different ways a person can be smart, or intelligent.
I think anyone can be taught almost anything with the right teacher, so I don't really believe that most "dumb" people are truly stupid.  Others have been told they are dumb their while lives, and buy into it, which is the worst.

As for Lisa, the only example I can think of is Hugh.  Her intellectual equal, interested in the same causes as her, but could not be kind enough to wear Homer's heriloom pig cufflinks, and didn't want Lisa to see most of the family ever again.

If one is looking for both in a relationship, it's not wise to compromise, especially with the kindness.

I would much rather be with a kind person, because I have been surrounded with uncaring people my whole life. Now I have a really nice boyfriend and a few good friends (mostly male, so much nicer than the girls I knew) and my life is so much better. Sure, I like smart people, but if they aren't nice as well I would not want to deal with them. I do agree with the classifications but I think that there is a grey area. I would say that Lisa is in between the both of them. She is intelligent and is also very kind, always having her heart in the right place. I like people who are in the grey area and I think that it should be mentioned.

I'd much rather be with someone kind, and I guess the majority of this thread agrees

It's not entirely impossible to be kind and smart at the same time, but sometimes it seems like the more a person knows, the more they have to think about. I once read a story about someone who, when granted three wishes (cliché, I know ), asked for great knowledge as one of them. The person who granted him the three wishes (it was actually a snake) reflected later that he spent a lot of time in deep thought, and rarely spoke anymore. There was just so much weighing on his mind that he didn't have the time for pleasant, superficial conversation

On the other hand, if someone is incredibly smart, it can also make them stuck-up or arrogant and feeling superior to those who don't know as much. It's an annoying trait in people...

Whereas if you have someone who is kind, but not altogether bright, you can still get along with them well enough. An obvious example of this is Ralph Wiggum; he's certainly not the sharpest tool in the shed, but he has that pure innocence around him that makes him a pleasant person still

Sylenne
While the "overbrained" pals looks unpleasant because of it's arrogance there's a little more point out of there. It's about their abilities to get a huge amount of information at one time. I myself can't do it, my brains simply falls to off when overloaded. The smartest can reach such more than ususal people it's not a secret. Their brains is their weapon.
But for me the 'pure innocence' mentioned by you is not too much better. While the smartest has its power of knowledge, the silly ones can be envious to them, and turn to be unpredictable. Where lies the happy medium?

Syke
And you truly right here, while the smart people is so knowledgeable about the area they need to get the success, they are kind too. They has it's communication abilities combined with knowledge of life and it makes them win. I don't know how in other countries, but in my the relations and connections is ALL. You simply can't reach the status and prestigious well-paid job if you don't have any contacts (to be correct many). That's the way to be happy