Okay, to answer your questions:
Time Setting - not specifically, I was thinking modern day for this sort of thing.
Ons - Generously 'gifted' women; intelligent partners; romance...and others, I guess. We can discuss them.
Offs - Probably nothing that I have to worry about, unless you're into some really weird stuff. Again, we can talk.
Multiple character - that I can do. I do it on a semi-regular basis.