I think it's beneficial to practice with a metronome or drum machine in order to strengthen your sense of time. It will help your concept of time and improve your feel.
When I was young, I had one of those Yamaha drum machines, and I used to practice to that quite a bit, just to practice soloing and being in time and completing all my phrases.
My drum parts are a song within the song; that's the way I look at writing my drum parts. They follow patterns, and they're written to interact with the rest of the band. There's quite a bit of thought that goes into it.
But really, anytime, I play on a practice pad as much as I can.
My drumming is always an experiment.
Even on the drum level, it's all about stating your theme, going back to certain things that need to be emphasized, not doing fills for the sake of doing fills.
Percussion is the most adaptable family of instruments. The biggest challenge is to project percussion in a lyrical way.