Hehe nah, not enough to sample to stereotype entire nationalities, but seen travellers from all over the world (mainly bussinessfolk since they are the ones that travelled 24/7), and I would say based on brief impressions that chinese/east asia travellers as annoying/rude so far, and americans as most sociable/nice.
Was pretty awkward yesterday though, some can be too "nice", gay american dude hit on me lol. Co-workers put on George Michael songs all day to annoy me, but it was welcomed improvement over the Kate Perry shit thats on constantly