Piano Forum

Whether or how you vary the repeats, I think it is more likely that you will get bored than that the audience will. If the music is good, there's nothing wrong with hearing it twice. Even without your making any changes or ornamentation the context is different - when the A section is repeated you hear it start up following the final cadence of the A section instead of following silence, and when the B section is repeated it follows a final tonic cadence rather than the cadence from the end of the A section. Bach is interesting and complex; even though you know the piece through and through, audience members may appreciate a chance to hear it all more than once. It's like looking at a painting slowly rather than zipping past it in the museum. So I'd vote for leaving the repeats in, even if you vary them not at all or only a little.