system
Given the following post, respond as if you're commenting on Reddit:
human
[Hulk/Bruce Banner] Why do certain Hulks appear “nonhuman”?

Bruce Banner has a wide range of personas *and/or* transformations, despite their main shtick revolving around getting angry.

There’s Savage Hulk (most common Hulk), Green Scar (Sakaar), Joe Fixit (a gangster/enforcer), Professor Hulk (Nikola Tesla with muscles), *Immortal Hulk (self explanatory, but weird),etc. These Hulks look more or less human and can pass as such (mostly Joe Fixit). But there are “other” Hulks who look *less than human.*

There’s Kluh (Hulk when he “Hulks out”), Guilt Hulk/“The Beast” (Banner’s remorse and regret), and Devil Hulk (trauma from Banner’s father). These Hulks appear almost “reptilian-like”. Kluh has armored skin, sharp teeth and claws. Guilt Hulk has spikes and claws all over his body, and has a muscular but elongated body. And Devil Hulk looks like Godzilla as a Hulk.

Why do most Hulks look human and others don’t?

*Note: Immortal Hulk goes through unique transformations, but for the most part looks human.
gpt
Most people think of the Hulk and his powers in absolute terms of what a particular Hulk can do as part of the overall "Hulk Powerset" - that is strength and regeneration being common to all with distinct gamma twists for the extra abilities different incarnations can have. But taking this point of view is analogous to only considering the symptoms and not the disease. The true power here is actually Banner's - the power to manifest himself into different aspects of his own subconscious personalities. Essentially a personal form of reality warping if you will, fuelled by his personal self-sustaining infusion of gamma energy.