I have 2 does (one is spayed, the other one's a crazy teenager) and one buck.
I don't really prefer one sex over the other, I know just as many friendly does as friendly bucks (most of which are not even neutered) but one thing I did notice with my own buck (which I strangely haven't seen a lot with the others) and that is that he likes to spray my neutered female (they used to have their playpens side by side, I had to move them as she started getting red spots all over her fur and ears:roll: )