My parents didn't react strongly either way. I think my Mother was a bit concerned when I started asking her questions like "What would you think if I became a monk?" but overall their response was neutral. My Father, who grew up Catholic and respected the Church from a distance, undoubtedly was happier with me Orthodox than me Protestant. My mom, after she had attended Vespers with me one night, said, "well, if you like it, that's what's important". I got mostly the same types of responses from friends who attended with me, lol. My best friend, after attending Vespers, said, "er... it was very... good harmony... lots of pictures... er... what were those candles hanging there for?"
I haven't yet had to explain about the various jurisdictions, and I probably won't try. From experience, it seems like that's an issue that you can't simply get a summary of and understand it. You either have to dig DEEP into it, or you won't get anywhere at all. That sort of reminds me of the differences between Catholicism and Orthodoxy, come to think of it.