During my childhood, it was Pokemon, which got me hooked to the videogame series to this day. Others were Tenchi Muyo, DBZ, and Sailor Moon, thanks to my friends.
Then it was Code Geass, Death Note, FLCL, and Cowboy Bebop that were shown on Adult Swim, finally put the last nail on the otaku coffin box. I started buying DVDs, watching a lot of anime online, downloading j-music, and placing anime pics on my desktop. Would I ever change that now? Of course not, it is part of my life and I enjoy it so much to give it up. Thank you anime!