I have shoulder problems so I no longer touch the bar to my chest. I am 175 lbs. and pretty strong on bench but I just can't go down to my chest or my shoulders will really start to hurt.
Every now and then I try to go down to my chest but my shoulders lack the flexibility needed to do a full rep. Nevertheless, I always feel it in my chest and my chest has gotten bigger, stronger, and more developed even though I don't touch the bar to my chest.
Anybody that thinks you HAVE to go all the way down to your chest needs to take an anatomy class. When the bar touches your chest your elbows are below your shoulders, this means your shoulders are now going to move the weight from this position. Your chest really doesn't take over till you hit about 90 degrees in the elbow.
I can get much better range of motion with dumbbells and I can throw up 100's on DB press so I don't think I really don't think I'm short changing my chest by not touching the bar to it.
And I can't stand guys that mug me at the gym while I'm benching because I'm not touching the bar to my chest. Mind your own business, I'm here to workout for myself, not for you.