For me,Romance.
It's much more easy to read if it is romance. You wouldn't miss anything and you're gonna definitely understand it quickly.
Sorry,but,ACTION is no fun to read. Well,this is my personal opinion. When I'm reading ACTION genre manga,I am really clueless on the result of the action. Like,"Huh?What did the bad guy did to make him fly
Like that?"
Hahaha..That's only my opinion. :)