A look of joy on your face and seeing your eyes light up combined with a quick kiss and a hug is probably all most guys need. There is one lass in particular, when she gets that look on her face I practically melt on the spot. Makes me feel like a million bucks (tax free).
I've had some ladies give me gifts in return, ties (always works for me), a nice shirt, gift certificate to Chapters (love reading) and pictures. No, not the nudie ones but glamour shots along with a nice letter saying how much they appreciate me as a friend and customer. Sometimes the simple things are the best.