@ossobuco,
I've written on a2k before that I think mature love is a product of a relationship, not the first flume of chemical ballast or blast.
Life is long, art is longer, as the saying goes, but marriage can be longest in wearing ways, or sometimes very dear to the heart.
Our poster and his lady agree on exercise and have similar interests such as in chosen major in college. But wait, many of us change careers as we become attracted to other interests, and who wants to pick someone because of the number of pushups? er, miles run on a given day.
Looking back, I've been interested in people with intellectual curiosity, not so much ways set in concrete. Well, that's me. In order to choose a mate, you have to know yourself, and that is hard at 24, prime time for marrying though that is.
On the other hand, I know a few folks who've weathered the years well as a couple. Not all that many though - most of my friends, relatives, and acquaintances had some missteps.
Not that all of us were sorry about missteps. Life is a learning period.