These are some very pleasing yet, some what nostalgic pictures to behold... The first one, I remember once, I was trying to draw a reflection of Lisa in a mirror, and couldnt figure out how it would look. So I modled a figure of Lisa using Blu-Tac, and posed it in front of a mirror, and simply drew its reflection.

Anyway, on topic, they're as usual very well drawn peices. I'll be honest, I wont say I'm suprised that you managed to create all the characters/objects on model in each picture, because your incredibly high standard expects this from you. However, the finished result is very impressive, and respects that high standard you leave behind.

I'll take a brave pill, and try to disect my thoughts of the subject.
Seems like, the first picture is representing the normal, drawing Lisa as an angelic creature. The second one is realising that, behind the wings, she's not an angel, just a normal person (personified as the sunflower ofcourse). And the third, is trying to become the angel. Maybe symbolising that, there is an angel inside us all? Or trying to find the angel inside?
This probably isnt what is was designed to be thought as, but its how I interpreted it. I like it a lot.

Thanks for sharing, I like these brain storming pictures.

Oh, as for concrit... I'm out of my league.

It looks fine to me!