Granted, I can't leagally carry yet (I am still waiting for my CCW to come back) but I have been practicing different carry options around the house and I have pretty much settled on carrying my LCP in my back pocket.
My reasoning...I can draw much easier from my back pocket than my front pocket. I also have no reason to carry anything else in my back pocket other than my wallet which I just recently switched over to my weak side. My front pockets are inevitably littered with misc. junk by the end of the day.
However the most compelling reason that I have heard came from another CC'er. I feel it's pretty logical although I'm sure someone could make a valid counter arguement. If you are ever confronted by a BG in a robbery-type scenario, more than likely he is going to ask for your wallet. He is effectively giving you permission to put your hand in your back pocket. Even if he doesn't directly ask, you can pretend to offer your wallet in a state of fear. This could give you the opportunity to reach in you back pocket without raising an immediate red flag.
Logical thinking or wishfull thinking. Open to opinions.