watch trigun, especially if you're into guns and action

imo, of the love hina episodes i've watched, i'd recommend you to read the manga instead.

Other series to watch:
Series currently being released:
Fullmetal Alchemist (the anime is better than the manga.. that's a first for me)
Area 88
Macross Zero OVA

Recent series that have been completely released:
Kimi ga Nozomu Eien (hotly contested whether it's really good or not, but it's worth watching)
Shingetsutan Tsukihime
full metal panic? fumoffu (but watch Full Metal Panic! first, or you won't get half of it!!!)
ROD TV
GetBackers (is it true that a 2nd season is coming?)

Other good series:
ROD OVA
Chobits
Hellsing (just for style points, no real plot though -- early series termination)
Great Teacher Onizuka
Cowboy Bebop
Roununi Kenshin (sp?) OVA (not the series, though the series is OK)
Cardcaptor Sakura (the SUBBED version, not DUBBED. From what I hear it's very good, but the DUBBED version is crap)

I also hear that Juuni Koukki (12 Kingdoms) was very good