I don’t grow the hot ones, but my favorite most useful peppers are the Numex Anaheim types. The best one for me is Numex Joe E.Parker, which is prolific and easy to grow. What I especially love about them is their thick walls. I love them get to almost full red stage, flame roast them (on the gas stovetop). I freeze a lot of them, then just slice off what I need. These are absolutely ambrosial in many dishes, such as eggs.
I grow about 50 plants each year. For the ‘non perfect’ fruits, let them turn red, dry and grind into a benign chilie powder. It is really good, but mind you don’t use too much, or be sure to add it to your carb totals, though it 's not that much.