A friend told me this:
Before marriage, open your eyes as wide open as you can.
After marriage, CLOSE your eyes!
Haha. I think that’s quite accurate. You first have to look out for unexpected ugly traits. Once you decided that you can live with all his/her faults, THEN you can brave yourself to enter marriage.
After risking marriage, you can do nothing BUT close your eyes to all his/her faults.