Couple things before we place out the list.
A] I'm Male, I play males, that's just what I do.
B] I work and I'm not on full time, the full time job keeps me busy.
C] Please write at least a paragraph so I don't feel like I'm driving the ship myself.
D] A lot of the time I'm on my phone so my spelling/punctuation may not be great so bare with me.
E] I don't fade to black on mature scenes, if you don't like mature scenes; I'm probably not someone you want to role play with. The role play will [b]not[/b] revolve around this unless we decide otherwise in a private conversation but if it starts I don't want people getting mad at me for not telling them.
F] I'm open to any ideas.
G] I'll try Neko, I noticed that's become a big thing lately but I'm not sure exactly how well I'll do it. But I'll try for those who crave it.

That being said here's a few of mine.
Master/Slave
Mistress/Slave
Princess/Man-Servant
Prince/Female-Servant
Vigilantly/Damsel (thinking a Zorro or Robin Hood theme might be fun)
Royalty or Rich/Thief
Assassin/Target
Best friend/Best friend
Roommate/Roommate
Friend/Friend's Sibling
Time-frame Themed. (examples: Western, Medieval, Victorian, Roman, Egyptian, ect) 

More to come, taking suggestions as well. PM or message here and I'll reach out to you.