I don't really keep up with new stuff, so most of the stuff I've watched have ended already.

I tend to like animes that involve sports or martial arts.The only anime I keep up with currently is One Piece--its awesome.
A few series I used to watch and can remember:
Hajime no Ippo: Boxing/Sports
Hungry Heart Wild Striker: Soccer/Sports
Oookiku Furikabutte: Baseball/Sports
History's Strongest Disciple Kenichi: Martial Arts/Action
Hikaru no Go: About a Board Game called "Go"
Yakitate Japan: Bread (I bake/cook so yeah...)
Rurouni Kenshin: Martial Arts/Action/Historical
Naruto: Martial Arts/Action (Stopped watching after a few episodes into Shippuden or whatever)
Bleach: Martial Arts/Action (Stopped watching after that story arc where that Shinigami with the glasses betrayed everyone and left)
Eyeshield 21: American Football/Sports
I am also keeping up with a few mangas too (mainly ones that I saw the Anime):
Hajime no Ippo: Boxing/Sports (After a few years of inactivity, we're finally getting new episodes!!!)
One Piece: Pirates/Action/Adventure
Naruto: Martial Arts/Ninjas
Eyeshield 21: American Football/Sports
History's Strongest Disciple Kenichi: Martial Arts/Action
Fire Emblem: Hasha no Tsurugi: Medieval/Fantasy/Action