I'm a big fan of the habanero pepper as it has a good flavor so makes a good base for hot sauces. The Carolina Reaper is derived from the habanero so it has the good flavor but must be used very sparingly. For chili, my preference is the ancho pepper. I use jalapenos in several different dishes, they're pretty much benign, similar to bell peppers, but have a unique flavor. I have several bottles of hot sauces. My favorite is El Yucateco red habanero. I keep a dozen or so bottles of that on hand because I go through it pretty quickly. Because I use it a lot, I need a lot more of it than I used to. One time at a restaurant there was a full bottle of El Yucateco on the table. I used 2/3's of it on the burrito I ordered. I use El Yucateco on things like burritos and tacos, tacquitos... For some reason when I make quesadillas I use Valentina's, which is a very mild but nicely flavored sauce. I also use Valentina's in some stir fry's. I mostly use my Carolina Reaper sauce in cooking. A couple of small drops will warm up a big pot of chili.
For reasons I don't understand, I've never had a hot sauce originating from Asia that I like the flavor of... though I favor the hot Chinese dishes that come with what appears to be dried chili peppers.
When I order chicken, when it's available I'll ask for the spicy version.