The whole route, from childhood lessons to a doctorate in music, with a lot of performance experience and musicological study along the way. So I have been playing the clavichord nearly all of my life. I perform on the clavichord, harpsichord, and fortepiano. In the last fifteen years I have given even more stress to the clavichord, although I have always offered it in recitals whenever possible.
Presenters often opt instead for the harpsichord, of course.
One of my earliest public performances, in school at age 16, was on the clavichord. In programs I like sometimes to play the clavichord with harpsichord or fortepiano. Basically, I prefer each to itself, and in its own function. I like many kinds of clavichord and do not have an inherent preference for fretted or unfretted designs. Whatever the design, I like a clavichord that allows a wide range of effects.