Some foods definitely work better than others. As others have noted, pizza usually does. And Asian stir fry type dishes are mostly pretty decent. Basic fried chicken (or rotisserie chicken) are fine too actually. They're not totally top drawer fried chicken like you get at a good restaurant that specializes in it but it's pretty good heated up in the oven. Soups. Etc.
And then there are a lot of foods that just aren't going to be good. Basically, if it's something that either cold or that you would normally consider reheating in the oven or microwave it's probably OK. Otherwise, not.
And, as others have noted, take-out you have more control over. There are some sandwiches I'll order from a local place and pickup given that I know I'll be home in less than 10 minutes. I'd be less tempted if I knew it might be sitting in a delivery car for an hour.
