[tsubaki]

For those of you that think BBQ sauce comes from the grocery store, there are more sauce combo's than homemade beer.
Depending on the geography, it may be an entire insult to ask for a tomatoe based, mustard based or even any sauce at all.
One event I went to the cook would only allow two sauce types, Tabasco and Texas Pete served on white bread (not buns).
The Carolinas have the highest reguards for their types, usually most of SC pig cookers want a mustard based, whereas NC preferrs a tomatoe based.