I have enjoyed the Ubel Blatt, and I'm wondering if anyone knows a manga that is similar to it. The amount of violence/gore/nudity does not bother me. I have read Gantz and I'm pretty sure it is way more violent then Ubel Blatt lol. But I would actually prefer a little bit more romance. I know some people say romance can kill a good story, but I personally think it strengthens the story. It doesn't have to be super heavy in the romance, now that I think can kill a story, but just enough that you know its there. I do however hate it when they hint at it, but then when the story ends nothing happens with it. A good example of the amount of romance I would prefer would be like how it is in Psyren or Green Boy: Shouting to You. It can have comedy, supernatural, fantasy, ect. I don't mind, but it definitely has to have action or I will get bored of it quickly.

Here's a list of similar manga I have read and liked:
Psyren
Green Boy: Shouting to You
Sword Art Online
History's Strongest Disciple Kenichi
Shingeki no Kyojin
D.Gray Man
The Breaker
The Breaker: New Waves
Katekyo Hitman Reborn!
Gantz
Tower of God
Rosario Vampire
Rosario Vampire II
Claymore
Girl of the Wild's
Full Metal Alchemist
Magician (Kim Sarae)
Kubera
Sekirei
ID - The Greatest Fusion Fantasy
Akame ga Kill!
Pandora Hearts
Witch Hunter
Ability
The Gamer
Ratman
Tsubasa: Reservoir Chronicle
UQ Holder!
Gate - Jietai Kare no Chi nite, Kaku Tatakeri
Soul Cartel
Alive - The Final Evolution
Defense Devil

That's all I can think of at the moment that I have read. I'm sure there is a lot more that I haven't listed because I can't remember them right now. I have read a lot over the years, so hopefully I can get some new good ones. And yes before anyone asks, I have read Bleach and Naruto. Thank you and once again I hope someone can recommend a good one I haven't seen yet.

maybe:
Red Eyes
Drifters
Sidonia no kishi
Kurozuka
threads of time
rain

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Vampire Juujikai. It has a similar atmosphere to Ubel Blatt.

If it doesn't interest you in the first couple volumes, keep reading. It starts heating up in vol 3 and 4.

Edit: You might enjoy Sengoku Youko. I can't say why, but I've read and liked most of the stuff you listed. I think you'll like it.

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Is this me in a nutshell?
Pretty much.

hm similar to Ubel Blatt, you should check Berserk out

and here some other manga you may be interested in, if you haven't already read them:

Archlord
Ares
Banya
Battle Angel Alita
Dorohedoro
Dreamland
Jackals
La Mosca
Nephilim
Saver
Shin Angyo Onshi
Tokyo Crazy Paradise
Veritas
Vinland Saga
XBlade
Zero

Thank you everyone for the suggestions. I have read a few of them, and I have heard of a few as well. Luckily there's quite a few that I have not heard of and I'm looking forward to giving them a look. So once again, thank you guys for the recommendations