Thanks Everyone!
What I have found out is that even if a jacket is U.S.C.G approved it does not have to float one's face up!
So now I see why one might choose a buoyancy aid jacket!
Seems like the only jackets that have enough flotation to do this and be able to move are the inflatable type jackets.
Only problem with these for me is having the mind to pull the trigger when needed!
Some people swear by the inflatable ones but my concern is wacking your head hard enough to get knocked out and then what good would it do you? But that being said, if you don't have one of those mega ones that float you face up then I guess it doesn't really matter.