I find it's sometimes better to start some things in the microwave and then roast or brown in the airfryer - for example jacket potatoes and aubergines. There's quite a time saving if you do it this way. Also I usually parboil potatoes before roasting as you would do with a normal oven and I've recently started to use my old pressure cooker again for precooking.
Some things, like corn on the cob, are relatively quick and really nice cooked in the airfryer.
I've always made quite a few "one tray" bakes such as chicken thighs with potatoes, peppers, onions and chunks of other vegetables, flavoured with herbs or spice pastes. You can have them juicy with tomatoes or sauce, or dry roasted. These are excellent done in the air fryer and brown very well. It all depends on whether your machine came with a baking dish or if you can get a good sized dish inside.
I've also bought a six hole, deep pan which I can use for Yorkshires or cupcakes, though I know that not all fryers can fit a tray.
When we have the grandchildren round we usually have a pudding with dinner and make a sponge topped fruit pudding.
Looking forward to reading all this thread to give me some ideas!