Action is my bread and butter, I especially like action when it isn't like "oh, Zero/Kyo/whatever rose up to power level XXX! Now he is stronger because he trained offscreen!"
I like action when the established powers or combat is used creatively, in ways you don't expect. I think I remember a scene in Dragonball Super (obviously that isn't a webcomic but just a example) where Goku railgrinds on a ki blast with his kamehameha to dodge the hit. Now that is epic, I love those scenes