I enjoy both, and think they complement each other, No Gi you can get a away with a lot, just by being sweaty! Wheras in a Gi you might have to be more carefull. Gi helps develop your grip strength where I feel you have to play a much more dynamic game without one.
So again I like both, and think both styles will benefit from the other
Its not about how hard you hit, its about how hard you can get hit and keep moving forward