I'm not a session player by any means. I can read charts, I can learn songs pretty quickly and I can pull out a reasonable handful of styles, but I like to express myself. I recently was asked to fill in on bass for some shows by a friend who filled in with my band on drums for a few gigs. Since I like his music and he helped us out, I agreed, even though it's not paying much (No pay for rehearsals, small pay for gigs). I showed up at the rehearsal space, which is a small pro/home studio owned by the drummer playing and we dug into some of the songs. My style of playing when I have creative freedom is more rambling, lead style bass so that's what I started off with and the songwriter/guitarist didn't have any criticisms and liked what he heard. The drummer, however, immediately started critiquing my playing, insisting that I hit specific notes on specific accents and even calling out the accents to me while we were running the songs. He's a very competent drummer, but also has a very straightforward, accent on the upbeat style of playing, and to play what he was suggesting takes a lot of the momentum out of the songs. I don't foresee this being an ongoing project for me, because double duty on rehearsals in addition to shows and a full-time work schedule puts a bit too much on my plate, but I do like the songs, and would like to see them performed the best that they can be. Had I wanted to continue to work with this songwriter, though, I'd probably reconsider it if it meant having to continue to work with the drummer. I don't really have any particular question, just needed to vent a bit.