I never really liked him. I'm actually more tolerant of him now than I ever was back then. I think on a certain given night, he can be great on the mic and usually when it comes to big match situations, he delivers... But I never really cared for him from day one and I remember laughing when I saw him on the DVD cover art of the 2004 Royal Rumble, thinking that he'll never amount to much. Then he starting getting really popular and it became obvious he was gonna become a main eventer and likely be one in the long term, and that made my disdain of him just grow. He was at least partially the reason I stopped watching from late 2005-2010. (I still don't watch Raw or Smackdown weekly (only every now and again) even now.)
Anyway, his former rapper gimmick (which, looking back, is something that made him more interesting than he is most of time nowadays), combined with the fact that he is often just annoying and corny, he has just always turned me off. He still somewhat bugs me now, because he's literally been forced down our throats as the top star more than anyone who ever came before him. Hogan was a top star for about as long as Cena has been now, but because there wasn't a weekly show that Hogan was always on, and because there wasn't a PPV every month, it didn't even seem like Hogan was forced down people's throats like the way Cena has been. Cena has been around longer than Bret, Michaels, Austin and Rock were at the top, so there's that. I'm really hoping the universe gives us a new top star soon, or forces Cena into retirement, or both.