You guys do what you want to do, because everyone is different, and everyone has their walkaway points... but for me - and I recognize it is just for me - probably my worst relationship (my marriage) was the one that looked best on paper (things in common, lived close by, etc. etc.). The best - the one I'm in now (and no, I'm not Gene Simmons telling everyone the latest album is "the best one we've ever done") - was sort of a leap. Little farther away than I would have liked, three kids including a young son with special needs, lunatic ex-husband who lives literally around the corner. country music fan versus a NWOBHM fan... and yet we gave it a shot and we couldn't be happier. The areas where we HAVE to be good (communication, patience, understanding) we're GREAT. I don't carry grudges, she doesn't make mountains out of molehills, and we're both in it for the long haul.
Point of the story, you can't win if you don't play. Ruling out women because of things that aren't inherently character flaws and are most likely temporary (how long can someone work 6 18's a week?) sounds to me like stepping over a dollar to pick up a penny.