#2 is clearly my choice for a few reasons.
1) I hate, hate, hate the #4 Kirby inspired Frankenstein monster look...I mean hate it. Yes...HATE!!! One of the reasons why I think the Original SS Hulk PF is overrated!! This is not a knock on the artist that came up with the concept for #4, as quite honestly, it is pretty good...but it has been kind of done before. I kind of can go along with the look of #2 supplanting the Kirby look of #4 concept. That would or could be a solid amalgamtion of the two. Maybe split the $10,000 prize in half and give $5,000 to the artist that did #2 and the other $5,000 to #4.
2) While I think the details of #1 are great, it has too much of a zombie Hulk look to me and I really don't get a transformation feel from that like I do with #2 or even #3 or #4.
3) #3 is in the area of #2, but I like the more excruciating / crazed look of Banner in #2 more. In addition, I also like the look of #2 style Hulk more than #3. #3 is well done, there is just a little more action and intensity in #2.
4) #2 is really the overall winner for me. I have a similar feel like Grumpy, but quite honestly, if for no other reason....it is almost the perfect looking Hulk face and body IMO. It is the one that appears to need the least work or changes made to it as well.
Overall, I want to congratulate all the entrants and I hope it inspires you / them to keep work at sculpting (3D or traditionally). It's better than anything I could have done and for that...I give you all the credit in the world.
If by chance #4 can get changed with a more modern looking Hulk similar to #2, then I'd be all in for #4. Or, why not go with #4 and change it to Ross / Red Hulk transformation?
