My favorite of straight Louisiana style hot sauces is Crystal. That is very popular in New Orleans, or at least was prior to the flood. Made in town, and present in virtually all non-tourist restaurants - and often even in those. Not easy to find here in the Phoenix area, unfortunately. I used to be able to, not so common now. When I lived there from 1987-1999 it was available at all the small restaurants, the places locals would go to. As I said, tabasco was around too, but seemed to be mainly used by tourists.
Oh, and not relevant to the flavor, but the producers of tabasco are the ones who introduced nutria to south Louisiana. They wanted to breed them for their fur. A hurricane came, breaking the holding pens, and they are all over now, looking like 3 foot long rats and damaging the many drainage canals in the area.