Well one that i always found to be enjoyable was Rurouni Kenshin, i cannot really explain it because i have not watched it for a long time but you might be able to find something. Case Closed(detective show), Death Note(a guy kill people by writing there names in a book, i havent really watch this 1 but i hear its great.) Gundam wing( It's about fighting robots, it was my childhood fav) Yu Yu Hakusho( lots of fighing, action, and adventure, and the show does not just have 1 person it concentrate on 1 person so if you don't like hte main charactor theres a few more ^.^)
I hope you check out and enjoy these Animes, and i hope you find a perfect 1 for you.
EDIT: added more =D