My chilli peppers I have grown from seeds. From November on I was alert on the occasional extra tasty or extra hot one.
Of two I kept the seeds, one with an awesome taste, the other with a very good taste and extra heat. Of the 33 seeds I sowed, 30 plants came up. Handed out quite a few, and kept a few for myself. Now I will keep seeds from prolific plants, if the taste of the fruits is good. Big difference in how prolific the individual plants are. I may even try to keep a few alive through winter, getting them indoors in time.