I wear glasses, and adding the 3D glasses over them doesn't bother me at all.
As for the movies, I want to see a movie the way the director intended me to see it. If it's post-converted, I'm not interested, I'd rather see it in 2D.
But if it's a creative decision by the creative team involved, and it serves a creative and/or thematic purpose, then I'm all for 3D and think it's fun.
The only two 3D movies that I've seen so far and have loved it are Avatar and Tron: Legacy. Filmed in 3D movies for creative/thematic purposes. Thor I saw in 3D and hated it (the 3D, I mean...the film was great.)