I would like the pie to have different colors. In between the unnatural hand posing and the pie colors, it's almost as if the pie slice is merging with the hand. Especially for short-sighted people like me.

 Haha, I intentionally made that position :) thanks for voting! 

Nice one, voted =)

Could use deeper shadows. Also the hand position is not one you'd use to hold a pie, unless you want to slap my face with it ;)

 Thanks : ) I think I know which pixel you're referring to... I guess it's too late for that :/ Glad to see you're beginning to understand the benefit of a limited palette : ) Take notice that I created my palette so that some tones could be green or blue depending on their surrounding clusters... this allows you to reduce your color count and make use of AA much more efficiently!

 I found pi, but it looks like there's a pixel missing on the right 'arm' of it. Might just be my eyeballs.

He's a happy chap. From this i can really see how less is more when it comes to colours. The whole piece has a clarity about it.