What do you usually prefer? The classic role play ideas, like.. naughty nurse, or getting arrested by a cop, or.. I don't know.. the professor and the student etc., etc., OR do you prefer to invent a new role each time? Something unique that hasn't been done to death before? 
When I first got started on YIM back in the day, I tried a little of everything -- I remember being a cheerleader and taken to a house to 'perform' for a group of men; I also remember being a cheerleader (again) and being kidnapped to an abandoned campground and handcuffed to a toilet while my captor went to town.
What I found I was doing was 'eliminating' strategies and scenarios and whittling down ideas to the one idea I could always do.
I ended up with using the working scenario of a guy breaking in to my house while I was showering. I liked it because I was vulnerable and nothing quite encapsulated 'violation' like being alone in the shower, only to have the curtain thrust aside and a masked man grabbing me by the mouth.
The scene also lead to one of two places. One, the intruder would tie me up, gag me, lead me to the bedroom, and start taking off his clothes.
Or he'd throw me over his shoulder and take me outside to his van/vehicle, where I'd lay in the back bound, gagged, naked and terrified as he drove me to his lair. Being already nude this made things a lot easier -- all he had to do was pull down his pants and get to work. Additionally the dichotomy of the scene was appealing -- you have me home, alone, and naked (vulnerability, comfort, warmth) and then thrust into this situation where I'm tied up and terrified (exposure, fear, coldness). One extreme to the other, and with just a little bit of chloroform!
I've since built on it, but the same general building blocks remain the same -- I typically play an average young woman at home, doing something mundane, when a man of ill-repute decides we're going to go on a 'date'.

Nudity, the way I'm tied up, and the location of the rape usually stay the same.
So in answer to your question: classic, because I know what gets me going. This benefits my partner too, because the more I'm into the situation, the more 'exposition' I provide.
