I like my sauces to be around medium thick, thick enough to stay put but thin enough to flow. +1 to the boss for his thread on Natural Gums, they'll do the job. Personally I add some Carrots or Sweet Potato to the sauce to get the consistency I want. I've also used Plantains, only takes a little, Heart of Palm, Celery Root and tested some Taro. By using these I'm not only getting a good consistency but am adding to my over Flavor Profile too. The gums are great when you have the sauce all dialed in but need to add some consistency to them but not change the flavor of the sauce.
Cheers,
RM