i personally hate yellow gold, esp with diamonds. I love white gold with diamonds, but i usually only wear rose gold. My skin has pink undertones and i think it looks the best on me. plus you don't see it coming and going.
i like white metals. i'm not picky. i own white gold and sterling. i'm not a fan of yellow gold in general, but sometimes wear fake gold plate stuff when i go out sometimes for fun and a change of pace...