Just coming across this thread. A couple ones I like:

1) Girlfriend got me hooked on Nespresso (she had machine before I moved in) and now I'm a big fan to the point where it serves as a tiebreaker between hotels

2) Won an Aroma rice cooker / pressure cooker at trivia night 3.5 years ago at State Chicago. Shipped it home (it was right after the Boston bombing - didn't want to be carrying a pressure cooker onto the plane). Don't use it often but when we do have rice, it really is an incredible machine that gets it done right whether white or brown rice

3) Pizza stone (brand unknown). Girlfriend's parents gave it to us and it's fantastic. We use it for pizza and girlfriend also uses it for baking bread.

4) Wine drying rack stand (don't remember brand - looks like a tree with 4 "branches") - it holds the glasses upside down by their stems to dry and makes life so much easier - no more drying glasses by hand or finding space on the counter to leave them to dry overnight

Have a few other gadgets (KitchenAid, ice cream maker, etc.) but when I cook it's usually on the grill so most of of the gadgets aren't important to me (though I enjoy the output!)