I have done caramel popcorn (Martha's rosemary caramel, to be exact, and I added spanish peanuts), and mug cakes. I also did spiced pecans, cowboy caviar, and mustard. I think I'm just running out of foodie ideas! I really do prefer making something savory as opposed to something sweet.
I bought a special little kit for dipping chocolate at Winn Dixie. It's in a reusable, microwavable little tray. It cost about $3.75 so depending on how the chocolate tastes I may be saved! (Thank you for the link, Wonderflonium, that is almost exactly what I want to do! Just with mini marshmallows instead! Yay!)
I've made infused vodka for myself before. I did nectarines and kumquat rinds. It was great. That was sort of expensive though -- you have to buy vodka you'd be willing to drink, haha.