Aela is probably the most popular wife in Skyrim for good reason. If you do decide to marry her, Uthgerd has her own home in the Whiterun’s Wind District which is a huge plus.
'Till death do us part,' yep, you guessed it, if you *ahem* kill your spouse (preferably inside your house to avoid bounty) then you can re-equip the amulet and go searching for another lover, you serial killer you. If the Dragonborn misses their wedding ceremony, they can approach the intended partner and ask for another chance. Uthgerd is a great character that can tank as well as deal damage to enemies. For good or bad there is a way to back out of your marriage in case you find a more suitable partner or got stuck with coyote ugly because you needed a place to couch surf.