I love it when she rubs my neck or the back of my head as I'm driving somewhere. My stomach is very sensitive,and its great when she lightly rubs her fingernails across it, back and forth, teasing as she creeps closer to my waist. The inside of my thighs are killers..that'll turn me on in nothing flat. Really, almost any touch, if initiated by her, is extremely flattering to me. Of course, my nipples are always good targets for a little light rubbing, kissing, nibbling, sucking.
My g/f does this thing where she "teases" me by gently moving her hand around my stomach, every now and then sliding slowly down lower, but then going right back up to the stomach again... Drives me NUTS....in the good way, haha
Generally speaking, people will touch each other the way they like being touched. Think about it. If you like being touched a certain way, you'll most likely try that on your partner to see if he/she likes it. Conversely, if they touch you a certain way, it might mean they like it done to them. Take hints from your partner. And if all else fails, ask.