kingdom hearts - it's one of my favorite game series while i perfectly realize how terrible a lot of the stuff is.
spiral knights - despite being one of my most hated games of all time i still have over 250 hours on it(somehow) and i still play it from time to time.
sonic heroes - filled with cheap death and insanely cheesy dialogue, and yet i still like it in a way. it's probably just the fact i grew up with the game though