I was dead set on buying a DS today. Today is the launch of the Mario Kart DS bundle. However, one of my cousins brought his DS with him on Thanksgiving, and I found Mario Kart to be-well, unplayable is the wrong word, more like not much fun to play, simply because the DS buttons are so small. I have pretty big hands, but I'm sure my thumbs are of pretty average size, and it was hard for me to not hit unwanted buttons while playing.
After being pumped about getting a DS, I find myself not wanting to get one at all anymore because of this. It's sad too, because I really wanted to play Animal Crossing, but I'm not going to buy a system for just one game.