What is the best trait combination if you want to complete all collections in the game?

That's a lot of collections to complete with just one sim. I don't think traits help that much depending on how you go about completing the collections. Some things you can just buy and some you can gift to your sim that collects stuff or just store collectable items from several sims in a museum. Personally, I prefer to work collections into my gameplay, so different sims for different stuff.