At first, I just said thank you and went on. Later, when I was a little more comfortable with him, I asked him what he wanted from me when he said things like that. I maaaaay have said in a slightly belligerent, 'What do you WANT from me???' sort of a tone. For me, people saying nice things almost always had a catch or the person wanted something from me, and it was pissing me off that I did not know what the catch was or what he wanted.