If my character marries it's mostly based on who I feel would suit them best rp-wise. I don't glom around for the hottest guy. It has to be a story that makes sense and that I like.
My Nord thief married Balimund because she was based in Riften and spent time at his forge doing some leatherworking (no that is not innuendo

). My orc warrior married Farkas because she was a Companion and his laid-back personality seemed to suit her best, and I thought the experience of
would be a bonding thing that would overcome the racial differences. My Stormcloak pines for Ulfric. My Altmer mage didn't marry anyone because it didn't suit her character. My Dunmer male will probably marry Jenassa and make cute grey babies someday.