We have a meat grinder, we grind venison, turkey, and pork, it's all good. I want to try a mixture of deer and pork for cured and smoked jalapeno and cheddar sausages.
You can add fat while grinding to prevent dryness, with leaner meats, if you want. You can grind any kind of meat you want. I saw some turkey burgers on Oprah that looked killer. I'm sure the recipe's on the web. they had some kind of fruit chutney mixed in, instead of extra fat, to keep them moist.
Any ground meat, or combination of ground meats, is great for anything you'd use hamburger for. Just make adjustments to allow for leaner meats, so you don't get something that tastes like sawdust.
Ground turkey, or ground pork, is great made into patties, dipped in flour and fried. Yummy! I haven't ground up chicken yet, but I don't see why it wouldn't be just as good.