I used to think Halo was just a Space Age COD, I WAS SO WRONG!! When I borrowed the first 3 from a friend, I must've spent a month in my room, beating the campaigns of 1, 2, and 3, and using my first-month free to play hours of Halo 3 online.
I also used to think Anime was stupid, then I watched Dragon Ball Z, it changed me, it really did. I went to thinking Anime-freaks were stupid and wasting their time (I was very ignorant) to having my room cramped with Anime DVD, VHS's, figures, posters galore! I also thought the same thing about Vocaloid (and music from Japan, in general), now, my iPod is 90% Vocaloid and other songs I can't understand, but still love.