I'd never marry in an any kind of institution, nor will I ever marry officially. The sermony is ok, but the rest I don't need or want.

As for what I would not marry:
religious people - as in people who bring their faith into everything I.E real religious people

Hardcore atheists - because they suck the joy out of mysteries

drug/alcohol abusers - because the fail at life

People who conform to stereotypes because they don't have the balls to be honest and express their true personality

People that cannot to a certain level take care of themselves

People whom I rate below 6/10 on the good-looking-scale

People who can't interact and find other people interesting unless they have something in common

People who have an issue about me smoking/drinking/swearing/having sex outside of marrige

Basically, if you can check one of these, I'll never consider marrying you, nor be in any kind of relationship with you.