We are building a small cabin in the woods. We're installing electric radiant heat under the floor and need some tile recommendations.
We've been told by the builder that ceramic or porcelain tile is preferable, but the walls and ceiling are going to be all wood so we need something to complement them.
This is a very general question, so I am going to give you a very general answer.
Any material with thermal mass will work well in this application: tile, concrete, stone, or earth.
For more information:
Check out the radiant heat section of our Ask A Pro Q&A.
You should also read Erik Henry's Q&A "What is the best flooring material to use over an electric radiant heating grid?"