They all taste the same to me so I don't have a favorite. I honestly don't think I'm a BBQ sauce person. When my dad used to BBQ -- as in grill over charcoal -- chicken halves, they were basted regularly with a mixture of white wine, lemon juice, olive oil, garlic, salt, pepper, and herbs. He never, ever used a ketchup based sauce.
I've also noticed that when I do country style BBQ ribs in the pressure cooker, even after giving the cooker a good scrubbing after use, it still smells like BBQ sauce months later. When I'm ordering something off a menu, as soon as I see that BBQ sauce is slathered on it, I opt out. For me, it has the same effect as green bell peppers -- dominating and diminishing the flavors of whatever I'm eating. I can do ketchup, but BBQ sauce, rarely. I prefer savory over sweet.
If anyone has suggestions for a sauce that's not so overly sweet though, I'd be interested.