Slam Dunk, Ookiku Furikabutte and Dear Boys were the only ones I really "watched". Eyeshield 21 and Inazuma Eleven to a lesser degree.
Unless they air on TV I won't really watch it, though. Which is almost every day because Ookiku/Slam Dunk airs on Animax at night and Inuzama/Eyeshield in the afternoon. C:
I watched Buzzer Beater which i thought wouldnt be so good, but actually loved it. Too bad it was only 13 episodes. Loved the animations aswell ^^ I also liked Giant Killing, thought it was very different from what i see week in week out.
I also read Hajime no Ippo, and been watching the anime recently, think its an awesome mang, but its starting to get a lil boring.
Thinking of starting Eysheild 21 as i am hearing loads of good things about it :)