Dopest fighting anime you've seen

[KyrieTheFuture]

I need a new show to watch

[BoogieWoogieMan]

Bebop Cowboy synchronizes their fight scenes with a jazz soundtrack. Pretty cool. Samurai Champloo is another good one. (Both are created by the same people)

[Micku]

Movies:
Sword of the Stranger (my personal favorite)
Ninja Scrolls (da gore)
Vampire D

TV shows:
Hajime no Ippo
Samurai Champloo
Cowboy Bebop (when they actually fight, and smooth jazz to boot)
Code:Breaker (I heard it's awesome)

Manga:
Berserk
Hajime no Ippo
Vagabond

[Kungfro]

Trigun

[That_Admiral]

Naruto had some good fights, so did Fullmetal Alchemist Brotherhood

[pauk]

Fist of the North Star
Sword of the Stranger
Ninja Scroll
Vampire Hunter D
Samurai Champloo

[Jameerthefear]

Gurren Lagann
Kill la KIll
Noragami

[Le Shaqtus]

Too many to name, but Samurai Champloo is easily the best fighting anime IMO.

Seconded.