1) Mixed-race (Oriental) and white people
2) Don't know if this is a race, but Tamils. They don't integrate with other races and a lot of them think they're really "cool" and "hard". Not being racist, but the majority of them do smell really bad- a lot worse than your average south Asian
3) From my experience I initially didn't think that highly of them. The majority I knew from primary school were incredibly loud and in your face. More recently however, the black girls I have gotten to known are incredibly nice and very sociable. I still have yet to meet any black girls I would date however. I just don't think Im particularly attracted to them in general but obviously there are exceptions!
4) This is very true, with my friends anyway. None of my non-black friends have dated or even pulled any black girls. It's probably just the culture difference and that black girls just aren't really our type. Although, this isn't only true for black girls, this view is also valid for south Asian girls.
I'm from London and my social group is incredibly mixed in terms of race and ethnicity and so my view isn't because Im from a predominantly white area and only know white girls. Don't take this the wrong way, but my friends and I are what you could call the top of the pyramid. We pull pretty much any girl we want, so I guess our view wouldn't be particularly representative of the caucasian population.