I don't know if this would really be a modesty thing, but I really can't stand it when someone is looking at what I'm doing while I'm creating it. I don't like it when people see my unfinished work. However, in response to the topic at hand, I am actually pretty modest about how people complement my stuff. Personally, it's just nice to hear someone like what I do and I'll take the complement.
I also can't stand people looking at what I'm creating or watching me do it. The compliments are nice, I usually blush and look away while muttering "thanks, it's alright"
With people I know a little more personally sometimes after a compliment I'll smile and say "I know" or "yeah, it turned out pretty awesome."