Hmmmmm I mainly go for individual personality, I'm game for anything usually.
Though for breeds I'm mainly fond of:
QH's (foundation style though)
Morgans (foundation style, I like them to have bone and not be too araby/saddlebreddy)
I like friesians but I don't know if I would own one because the few that I know are nice but dumber than rocks. That breed would have to depend on the individual.
I Do NOT like gaited horses at all. I don't like the gaits and the ones I've run into are kinda stupid. (Though maybe I've just had bad experiences)
Gender is whatever, I don't care so long as it's not a stud! As for color anything goes although I have a thing for buckskins/duns and grullas as well as paints and roans.