I don't usually tell anybody these days. I've told everybody I'm close to, and mostly it's as if I never said it, except for my partner who understands why I can't cope with too much background noise etc. With people I'm not close to, there isn't usually time for matter to come up, and I don't usually have any trouble coming over as reasonably normal and harmless.
I do see myself quite strongly in an Aspie light though, it does seem to be a part of who I am. I think about it a lot, but that's because I think I can develop better coping strategies by doing that, I don't identify myself as Aspie as much as I think about how the traits express in me. I still have much the same sense of identity as I had before I knew of AS, it's just got yet another dimension now.