First one is cool. The colors there look awesome and lively. Looks like it could do nicely in like some nature magazine or something, seems professional
A quick glance at the second one makes it look a bit blurry, but if you look more closely, its got a nice focus. The sharpness on the snout does make it look a bit awkward, but I also like how it is now. Has an effect like since his eyes are closed and stuff, that it's more distant...
For the third, what sqrage said. Maybe if we saw the whole thing from a distance, it'd look fine, but at this closer view where it doesn't even fit in the browser, heh, the background does distract from the tiger.
Ghan has said he has fixed this. Monovertex please confirm this fix. This was only a problem with people that had signatures in the upper levels like not the special members but the respected members.