I have a LC9 and absolutely love it- that being said, me being a 160 lb, 5'11" male, with a 28 in waste- I would never consider it for pocket carry. I personally think that, at least for me, it is to big to get it easily out of my pockets- even with cargo shorts.
That being said, a friend of mine has a LCP that he carries in his pocket every day and he says it works great for the purpose of a BUG. However, it should be noted that he also said that if he could only have one gun it would be a LC9, IWB carry; this is the method I have chose to carry when going for concealed carry, and I can make it effectively disappear even wearing a medium sized shirt. It does print a little with a small sized shirt.
I assume this would be obvious- but I would highly recommend before purchasing a gun for the sole purpose of pocket carry, make sure you can easily get it out (and back in) in every position you will want to be able to use it and defend yourself, including sitting.
Good luck and let us know what you decide!