All three are good. If I have to choose, it's a tough choice between bread and pasta. There are a lot of variables to this whole matter though. My first inclination was to go with pasta because I absolutely love some things like fettuccine. However, bread is a big tent and, aside from the usual stuff you'd think of, it can also include quick breads like banana bread, zucchini bread, pumpkin bread, etc.
I think I'll go with bread, but pasta is a really close second place and I feel like this answer can change depending on the day. I eat pasta more often than either bread or rice, but again, there's a lot of variety under the bread umbrella that gives it the win for me here today.
I'll eat rice, and I don't dislike it, but I don't love it either.