I'm looking for good manga that has action and that has romance in it.

No shoujo, shounen ai, yaoi, or reverse harem.

Examples of what I want: Ubel Blatt, Black Lagoon, Rave Master

I would prefer darker series like ubel blatt but if its like rave master then its fine.

Alive: Saishuu Shinkateki Shounen

Akame ga Kiru!
Deadman Wonderland
Hoshi no Samidare
Immortal Regis
Cavalier of the Abyss
Wolf Guy - Ookami no Monshou
Wake up Deadman
Mirai Nikki

I would consider these dark romances with action, I guess.

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www.Hyperiums.com

Thank you both but I have read all those that you suggested
Though I did drop Immortal Regis and Cavalier

Wolf guy was ridiculous excepially the last chapters.

I've read the first volume of Alive does it get better?

3x3 eyes
ushio to tora
holyland
trace
ares
zeroin
fullmetal alchemist
the breaker
breaker:new waves
dangu
btooom
kiseijuu
basilisk
gantz
berserk

approximately from least to most dark. I love these too, so please post more

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When you meet your god, tell him to leave me alone. --Guts -Berserk

I've read the first volume of Alive does it get better?[/quote]

it not only gets better but it gets amazing as well.
in the beginning even i didnt like it that much but now it has become one of my all time favorites.
the whole plot is filled with action, but romance is a main theme.
the art also improves and towards the end becomes beautifull.
highly recommended