@Matthew: That isn't a sprite, that's a bloody pixelart! Wow...and wow, again :P
@Carnix:The eye thing isn't done too badly, though I'd edit the rest so it doesn't...well, look like Shadow.
Spiret is an interesting idea, but you have only reshaded one colour. Change all the Chaos colours to different shades (of grey or something), but make sure that depending on the shade you recolour, that the one you change it to should be lighter/darker. Also, then add these colours to the spines to make them blend in better, You may want to blobbify the spines more, or try to keep them alternating better.
Some of my sprites, I really need to add more to these. Haven't been touched for quite some time.
And this is a Blaziken pixelart I did a while back. Considering it's my first (and currently and probably only ever) pixelart, I'm pleased with it, though there are numerous problems with it:
And finally, some Sonic emote things I'd been doing a while ago also, based off of some other smileys:
Ah...that's it for now...comments plz.
I believe this should now be considered an open thread?