I usually run a 4-3 if the offense package seems to be a run play, other than that I normally uses schemes to defend the pass. But I play frans mode alot. I like to play with as many teams as possible to try different off and D fence. I recently started playing with the Dolphins and I started falling in love with the 3-4, It seems to be a good outside run and HB screen and HB pass to flat stopper. But I have problems defending the inside run, it seems like the A gaps are easy to run through and if I over committ why LB to blitz the A gaps the HB cuts to the B gap and hit another hole. Still im in a working process with the 3-4, I think im going to switch.