Can't say I'm open about it, but I don't mind telling friends and people close to me. Though I do feel hesitant to check PC while at school or somewhere public.
Probably because I actually used to be ashamed, maybe around a year ago. Eventually though I stopped caring about what people would think so that helped.
Besides, when I say 'PC' people usually assume I'm just talking about my computer, whether the term's out of context or not.