Meh.
I find wide triggers are better than narrow.
Flat v curved depends a lot on the trigger stroke - if it rotates on a pin, curved is better; if it moves directly to the rear then it does not matter.
When I'm target shooting or hunting, the bottom of that trigger is where my finger is going every time.
BUT. For a CCW handgun...I still think I'd prefer a curved trigger. A CCW handgun is an axe, not a scalpel. I want that feedback that says "this is the bang button".