I liked all transformations. But...I didn´t Bruce tranforming into Hulk because he was angry except the third Hulk-out. It seems, he was angry because of the shock that Mr. Blue gave him.
In the first Hulk-out, Bruce said he might get angry, but really, it was because he was freaking out because he was getting beaten, so he was therfore, outraged.
I love the voices Lou Ferrigno made for the second Hulk-out. I like the scene showing Bruce tranforming into Hulk from his back. But it reminded me of the TV show. People outside hear voices, then Hulk comes out, and we didn´t actually see him transform, but heard him transform. Bruce like maybe gets pushed outside, then comes back inside as The Hulk. It wasn´t nesacary to see Bruce tranforming inside then. That whole scene was really meant to see what the people´s (the military) reaction from outside would be. To first see Bruce in the building, but in a few seconds, he would come out as The Hulk.
I think the third was probably was the best, but it disapointed me because Bruce´s third hulk-out was too short. We saw him change into the Hulk, and then quickly change back into Bruce.