I loved in Hulk vs. when Loki takes over the Hulk's mind and by doing so, unleashes the pure strength of the Hulk, I was speechless. One of Loki's pitfalls was his strength. Multiple times that of an average human but paled in comparison to his half brother, Thor. I guess Loki figured that there is always a solution.
When the Hulk went up against Wolverine, there were a couple of points. One, the Canadian government used Wolverine like a bounty hunter. And two, when Wolverine initially finds Dr. Bruce Banner, Wolverine says, "...hey, you smell toxic." and then the fight starts. I knew I was in for a good show when that happened.