People (including myself) often wear mechanical watches because they really enjoy the engineering/history/whatever of mechanical movements. To me, I enjoy getting to wind my watch/set the date and time/have a reason to interact with it. I enjoy that it's a conversation starter for some people (hey, nice watch!) and for others it's an opportunity to talk about something I enjoy. It's also nice that it's aesthetically very pleasing compared to a random seiko or electric watch.