Xenocrates;; I likey :3 The first one looks nice and simple. It took me forever to realise the musical notes to the left of his head xD The second one looks nice as well: the colours are nice, and the dot brushes make it look more, er, interesting. Although the lighting at the corner looks a bit too bright. I'm totally loving the third one <3 I prefer the first version, since that shade of green is better than the lime-y one on the second version, although the bit that says 'magic' looks a lot cleaner on the second one, rather than the first one. But yar, they're all good. I'm almost inspired to make icons of my own xD
Kai.;; The render blends too much into the background and everything looks far too bright (or at least on my screen, it does). The vector brushes look nice, though. And the blocky font for the text matches with the vector shapes. But everything looks too monotone. Work on the colours and image blending ^^
Ishida;; Nice smudge xP But I really, really don't like the distracting bright patches of yellow/orange/white D: It also doesn't help that most of these patches are located right next to the render, and that the render is low quality, from what I can see. The text is also quite distracting. The scan lines look fine, though. Basically, tone down the bright patches. Those are probably the most distracting things about it.
---
I added
too much more effects, and got rid of the text:
There actually is text there, but you'll only see it if you look really closely. And no, it's not supposed to be visible if you only glance at it. It's not supposed to be visible, period.