I,m in the same rut right now have not touched my bass in over a month. I have been very disappointed at myself. The motivation is hard when all your doing is playing by yourself.
I have never, ever felt that way. To me, playing an instrument is an opportunity to go off into another world, a different reality. And it doesn't matter if I'm alone. Nor does it have to be practice or an exercise. It can just be about the sound(s) I make, the harmonies and how they interact, etc. Heck, it's easier to just say, "a separate reality."
I play bass alone often. Sometimes I study, and then I often just find myself mesmerizing on something I just came up with. Very enjoyable.
