Different phases of life, different priorities, and different perspectives. Someone in their 20's is still trying to figure out what they want to do with their life. I've abandoned the search and am now stuck somewhere between raising my kids and trying to buy myself some free time before I die.

I also think you have to be friends with your spouse to have a successful marriage. Lucky for me, my wife is my best friend. It's pretty difficult to build any sort of meaningful relationship with someone you have very little in common with.