About ... counts on fingers ... five years older than you were.
The gain in maturity! The accumulated wisdom!
Kidding aside, I think the 20s are a great time of change. I haven't changed as much since I hit 30, so, based on my own personal experience, I'm in favor of marrying later.
Your opinions may vary.
Edit to add: we lived together before marriage though, another good thing in my book. Again, opinions may vary.
