I don’t want to be one of those people who sees G as being easy but Eb as being hard, for example. I want to see them as equals. When working on an arrangement or interpretation of a tune I’m mindful of running it in different keys, different octaves, different positions and different fingerings. Was that an Irish jig, a free jazz freakout or a downstairs mixup? Who knows? Who cares???
Basically, I am striving to play stuff in as many different ways as I can think of, while understanding the “similarities” of each different way. I can easily spend a whole evening doing this with just one tune or one or A-part or even one phrase. As a result, I am having more fun than ever before practicing/playing music.