Sometimes i really like it very much just to be tied up and NOT have sex afterwards. Or before. Or while being tied up. On other times i have just plain old - and often good - vanilla sex. And i definitely am not too fond of sadistic things.
But still, i consider myself a submissive, and i think it's not acting. I get really turned on just when he ties my hands behind my back. And so does my Master (think that i'm a sub and get turned on). So, all in all, i'm quite fine and honestly i don't give a rats' ass about what others think of it.