Complex sentence: In my experience, most people who take part in FAP are very relaxed and good natured, and I think some of the nicest people on the project work at FAC: a community of brilliant people who are interested in producing quality work.
Split into simpler sentences: In my experience, most people who take part in FAP are very relaxed and good natured. Particularly, I think FAC has some of the nicest people on the project working there: a community of brilliant people who are interested in producing quality work.