Any recommendations for manga like ajin, Tokyo ghoul, snk etc without romance ? I'm gettin...

What snk?

Try reading Bastard?

shingeki no kyoujin

http://www.mangago.me/read-manga/kanojo_wo_mamoru_51_no_houhou/
http://www.mangago.me/read-manga/tenkuu_shinpan/
http://www.mangago.me/read-manga/apocalypse_no_toride/
http://www.mangago.me/read-manga/shut_hell/
http://www.mangago.me/read-manga/sprite/
http://www.mangago.me/read-manga/prison_lab/

Shingeki no kyojin aka attack the titan

Thank you everyone

you're getting tired of yaoi? Σ(っ°Д °;)っ

Not really. Its just that I almost read all of the yaoi and sometime they have a similar plot which I can predict. It turns boring. But still yaoi is my favorite genre :p