I would think it will be a slow work up to the type of sex you want, seeing that he isn't the aggressive type.
How rough do you want it? My husband and I like it rough, but he's a "take it" kind of guy, which I like. It's hard to fake that.
I would say to mention it to him, that you think it would be fun to have him get aggressive in bed and then talk about what that means. Don't be worried if he doesn't do it for a while...it has to come from within to really make it good. He'll have to work himself up to it to make it 'real'.
Or maybe he'll blow your mind and say he wants to do it too
