My wife and I once had tea in Nagaland with men who’d been cannibals in their youth, but they weren’t anymore (and — in point of fact — probably didn’t have the teeth for solid food anymore,) so I don’t think that counts.
For the most part, I don’t think of customs as being more or less interesting, just — sometimes — unexpected. I’ve noticed that most people see cultural customs as the strange behaviors other peoples do, while their own culture’s customs are largely invisible to them (i.e. “That’s just how things are done; it really couldn’t be done any other way.”) So, I guess it’s been most interesting, having returned from living abroad for more than a dozen years, noticing just how many strange and baffling things Americans do.
Tiger Riding for Beginners 