Slow cookers are great. But I do find that if you over-use them, everything that comes out of them starts to taste the same and it gets really boring, really fast. I probably only use mine once or twice a month.
Most often, I put a chicken or turkey carcass in overnight with some water and wake up to chicken stock to freeze for later use in recipes. It’s also my favorite way to use up a ham bone for split pea...