I'm not sure.

[Malibu]

This looks different on a white background.... I'm not sure I like it anymore.

 

[Color Me Evil]

guy is too green. background doesn't really match either but I like the effects. gimme dat stock

 

[D.D.D]

I like how you blended in the bubbles with the guy, and the stock is interesting. Depth is good too. All I'd say to improve it is to maybe add more effects? Not too much, of course, but maybe more than just the bubbles and little sparkles.

 

[Malibu]

NEW VERSION

guy is too green. background doesn't really match either but I like the effects. gimme dat stock

Here you go: STOCK

I made some colour changes but I didn't get rid of the background (to much work), although I see what you mean.

maybe add more effects?

I thought it looked empty as well

 

[Ðari]

Not really a fan of the colors, I feel their so plain and don't compliment each other. Hit up your color balance, bro.