Someone recently gave me an Indian cookbook for slow cooker recipes, and I've been working through some of them. So far, the aloo mattar (potatoes and peas), chicken curry, and gobi sabzi (cauliflower) have been hits. Making a squash dish today. Haven't tried the chana masala (chickpeas) yet, but it's on the list. If any of those sound good to you, I can copy out the recipes.
If you're more into Mexican food, I make chicken tinga in the slow cooker. Great with tortillas or on salad.
Chili is also always a good option, but I don't have a recipe, I just wing it.