I prefer them crunchy, but if you like them softer, add some of the aquafaba (chickpea liquid) from the tin or cooking pan.
I add all sorts of things. My kids love nutritional yeast on them (has a kind of nutty, slightly cheesy flavour). I mostly use spices, so things like cumin, coriander, ras el hanout, zaatar, cinnamon - obviously not at the same time!
Chickpeas are quite forgiving, so if there's a spice/herb combo you like, try it. I like to take a few spoons of the aquafaba and mix that with the spices. I then mix my chickpeas into the mix, as I get more even coverage.
If you save the aquafaba, it can be used as an egg substitute in baking. I'm not vegan, but I find that more convenient as eggs never get used up.