I can make sense of people, but I have the clear and distinct feeling that my way of thinking doesn't make sense to anyone else. That's a lot stronger than just feeling different, but not at all what you describe.

Interestingly, I _have_ the 'the way I think generally makes no sense to anyone else' thing - and it's always a pleasant surprise when it's proven to not be the case - but for me, it came from feeling like an alien for so long.

If other people's behavior made no sense to me for most of my life, there's no possible way I'm going to expect myself to make any more sense to them. *shrug*