This thread inspired me to re-up on Marie Sharps. Took a trip to Kalustyan's in Manhattan for a couple of bottles (and a bunch of the things that no one else ever has). MS has unfortunately gone down the road of offering a baffling number of versions, so it's hard to know which one is her regular hot sauce. It's pretty easy still to find my favorite version ... the green prickly pear habanero flavor. It's a bit unusual and I find it addictive.
I also use a lot of the standard rooster sriracha. Completely different flavor profile that goes well with so many things. And I love that it's cheap, comes in a huge bottle, and can be bought everywhere.