Makes a great breakfast shortcut. Handful of diced potatos and peppers, couple pieces of bacon thrown on top. Set for 13 minutes at 375. Jump in the shower, come back to crispy bacon and potatos, then just cook a couple eggs over medium on the stove.
Makes really good marinated chicken, pork, beef nuggets too. Just dice up the meat, throw it in a bag of marinade, pop it in the fryer for ~13-14 minutes at 400 and you get nice crispy nuggets.
Breading your own stuff and getting it to turn out well is a bit of a pain, but there are a couple air-fryer breading mixes at the grocery stores that do pretty good.