Always have some "Mixed Veggies" dried and ready to add in soups, stews, meatloaf, etc. I get frozen bags of mixed corn, carrots, peas, and green beans. Put 'em in my Excalibur and let it run overnight.
We've also got some jars of each of those individually, along with smaller amounts of dried celery, bell pepper, parsley, and other herbs.
Tried dehydrating potatoes in various forms. The Mrs. is still deciding if she likes home canned or reconstituted dried potatoes best. Until then I call it a "tie" and we keep some of each!
Apple rings and dices handy for snacks, trips, baking, desserts, etc.
Not a dehydrated food, but I also use our Excalibur regularly for making yogurt.