I carry on my body at about the 2 o'clock position. I tried at the 4:30 / 5:00 position but that didn't work too well for me. I don't know if that was because of my current holster or not. Carrying near my back hurt everytime I got in the car. I'm thinking of getting a new holster from Crossbred, which may take care of that problem. If not, I like carrying at the 2 o'clock position for now.
I personally cannot see myself ever carrying my gun in a purse, as sometimes I will have my purse, some bags and a drink. My purse is a black hole, that it is hard to find anything in. If a problem comes up, I can drop everything I'm carrying and reach my gun on my body. Plus as I was taught in my CCW class, what happens when the bad guy takes my purse?