Hey, I happen to prefer PMs too. Also, I like playing a lot of different characters. I get bored playing just one because it makes the world we build feel too small. D: 

I actually have this sci-fi alienish (except it's also a lot of humans??) plot that I wanted to try out if you're interested. Also, feel free to tell me about whatever plots you really want to do. 
Warning you in case this is a dealbreaker for you, Master/Slave is just something I really don't like, though. I'm fine with playing with power dynamics to some extent, but Master/Slave just really makes me uncomfortable. If you're fine with leaving that sort of pairing out (unless it's so messed up that it's not meant to be even remotely alluring), then I think we'll get along considering our respective needs as roleplayers.