Louisiana "The Original" hot sauce. A little more heat, and a lot more flavor than Tabasco. Tried Crystal, Texas Pete, and many others, and this is my favorite "general purpose" hot sauce.
I've got tons of others that I've accumulated as experiments, received as gifts, etc. Some are boring, some deadly.
My favorite hot sauce for Mexican dishes is Valentina extra hot. More flavorful than Tapatio or Cholula.