There must be a spot for middle because I've played both roles. I wasn't a very good submissive... ....I guess top by default.
Mostly I am a bottom. This was always my preference. However, as I have gotten older I am moving to a role as a top, occasionally. This is something I would never had done 10 years ago.
Never tried but I know I'd be versatile. I think the whole concept of top or bottom is stupid. Why should you have to nominate which you prefer? It's something personal really I don't think anyone else cares.
Im versatile, but it really depends on the person. If im with a top, im a bottom. If im with a bottom, im a top. if im with a versatile, im both