Yes, of course I eat fast food, for much the same reason as many others do; sometimes it's easier to buy food put together by someone else than to make it yourself, especially when you have more money than time (and really, an occasional biscuit or burger doesn't add up to a lot of money). That said,*some* fast food actually makes me sick, so I tend to avoid foods with a lot of bread, and I usually don't eat fries or soda.
Some people wonder if fast food is healthy. Well, that depends on your definition. I personally have views that are similar to the movie Fat Head (see it free on Hulu), so I'm not so worried about whether fast food has too much fat, but instead whether it has too much salt, sugar, or simple starch (think fries and Coke). So, I eat fast food sometimes, but usually I get a burger and no fries or soda. After doing this a couple of years, I don't miss them that much.