I try to use the transpose button only when absolutely necessary...for instance, when a horn player is sitting in and doing a song I usually do in a different key (don't want to
make him sound bad). For many tunes, it dosen't make a difference, but occasionally...

For songs in my library, I always try to learn them in "my" key. That's because, sometimes I use a house grand piano...obviously no transposer.

That's what works for me.

Russ