Anyone who likes heroic fantasy ought to watch Sorcerous stabber Orphen and Slayers (the 3 seasons + the movies). The former is quite ok, and the latter is very good (season 1 and 2 and the movies are the best). There's a lot of comedy in both series, so it shouldn't get much boring at any point.
Has anyone ever heard of death note? I have read the manga and it's quite interesting. I haven't watched the anime but I believe it follows quite loyally the manga's story. Beware, when reading Death Note, I have found many inconsistencies which kinda ruined my reading. If you don't bother with such things , the story is pretty much ok.
If you like american football, there's Eyeshield 21. I don't know about the anime, but the manga is E-X-C-E-L-L-E-N-T! It's a jewel: there's action, there's humor, there are funny faces everywhere... The football matches are a bit exagerrated, but I don't mind.
There's also the manga entitled 20th century boys which was made by the same author who made monster. It is amazing and the story evolves at different periods of time: the 70's, the 90's and the 2010's. It's a must read. No anime has been made yet.
Oh, and screw naruto and bleach... I am sick and tired of them.