Spicy food just doesn't affect me all that much. There's some intense pain when I'm in the mood to eat raw peppers, sure, but it passes after about ten minutes, and I never find myself sweating or feeling ill to my stomach.
I wonder if its possible to build up a tolerance. Apparently I've been eating hot peppers since I was less than two. I demanded to try some peppers (don't know what kind, but they couldn't have been that hot) at our dinner table when I was really little. My parents decided to humor me, but I ended up eating a whole bunch of them. Six was my first habanero from the garden. I really regretted that at the time, cried for a good hour, but now I don't have a problem with them.