If it's a passionate conversation and its both ways and interesting and with someone I want to get to know or love the sound of their voice then that's great but otherwise KILL ME NOW!!
I've never been a camping type of person. I like nature, but I'm going be honest... I like indoor plumbing and electricity a bit more. So personally it's lame, though I understand for many it's cool.
Holding hands with your significant other in public.