Another commenter astutely notes: 


What I've observed is that friends / peers (I'm a recently married woman, whose next birthday will be #30) end up doing, often, is trying to settle on the things that *do* matter -- religious compatibility, emotional abusiveness, irreconcilably different views on when or if to have children and how to parent them if so, etc. That seems to be the problem with "settling" -- you settle on the wrong things. Then eight years and two kids later, you're in an ugly divorce...
I've seen a few of those train wrecks as well.

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