Hogan was an enigma. Easily the biggest star wrestling ever produced (sorry Rock), the biggest face/good-guy the business ever saw, and the biggest heel/bad-guy the business ever saw. He was the central character in McMahon's bringing of wrestling from the days of being on UHF channel 48 to the mainstream, and from regional to national promotions. He was also the central character in the Monday night wars of the late 1990s and NWO storyline that saw wrestling viewership reach all time highs.
On the other hand, he said and did a lot of things that, shall I say, weren't so nice and he had a reputation for stepping over people to protect his character.
RIP Hulkster. Somewhere the Iron Sheik is chasing after him right now.