I've had two girls and one boy before, and they've all been lovely. My first was a girl and she was quite docile, as was the boy I had. I currently have a girl and she's really feisty! She loves to explore and can be very fast. I think it can really depend on the individual. I haven't actually noticed a smell from either of the females I've had, but again I think that varies.
Personally I wouldn't worry too much about it, you'll probably know which hamster is right for you when you meet them
