Hulk- The Savage Hulk is arguably the strongest and best-known of the comic book Hulks. This Hulk had the longest consistent tenure (appearing from approximately 1965–1983), despite not appearing continuously for more than a year at a time since the early 1980s. The Savage Hulk diverged from Banner during early childhood, due to Brian Banner's abuse. He possesses the mental capacity and temperament of a young child, and typically refers to himself in the third person. He often claims that he wants to be left alone albeit in an attention-seeking way, with frequent "Hulk smash" temper tantrums. Sometimes he also shows behavior that reminds more about an angry animal than a small child. The savage Hulk also seems to be immune against mental attacks that would stop normal humans because of his more bestial brain (Incredible Hulk #259).
The Savage Hulk is normally depicted as green-skinned and heavily-muscled with a loping, ape-like gait. The mouth area of his face is greatly enlarged, and his nose is extremely short as a result. He rarely wears upper body clothes (which are almost always ripped off in transformation), but usually wears the remnants of Banner's trousers (which are often colored purple).
When Banner was separated from the Hulk and drawn into the Heroes Reborn universe, he became a Hulk which resembled the Savage Hulk there due to Franklin Richards reverting the heroes he placed there to the forms he was most familiar with. However, this was apparently not the true Savage Hulk persona.
Although the Merged Hulk has the highest "base" level, the Savage Hulk's sheer capability for anger, combined with the propensity of all the Hulks to get stronger with rage, means he is potentially the strongest of the Hulks.
The different incarnations have to some degree continued to evolve their personalities in different directions since they first appeared. Especially the Savage Hulk, who has been around longer than the other incarnations and had more time available to develop. Even if he started his existence as a reflection of a child, he is showing mental abilities not usually found among children. He is very independent and can find food and other things necessary to survive by his own wherever he is. And unlike normal children, he is not easily scared and never appears to get lost. His intelligence is much lower than average, but still he has gained a lot of experience and is able to understand more than one would expect from him. According to the Leader, some of his changes can be traced back to changes in the solar activity, which he seems to be sensitive to (or at least used to be sensitive to at some point in history).