My Blastoise is female. But only because I SR'ed until it became female XD
I think the lot of my team is female. I believe I have a female Jolteon, Clefable, Nidorina (well, I highly doubt you'll see any male Nidorina XD), and Ninetales, plus one more Pokemon I don't remember (I think maybe Kabutops).
I just like Ghost Pokemon XD And ghosts in general. Hence my theme and username. The character my name comes from is a ghost princess, and part of her name is related to ghosts.