ok, i have a friend that playes geetar and we haven't jammed together in some time. last jam session(3weeks ago) was awesome and we stuck to hendrix/doors/jazz type of music. today we started playing and he was on some crazy metal/rock stuff. like alice in chains and metallica and some other stuff. he keeps on learning all of these tabs by himself and expects me to put a bassline to it. i don't even listen to that kind of music. i am a happy guy and usually lay down my own happy lines, but he is now wanting me to learn some of this, what seems like, unhappy music. is there any compromise we can strike? like a happy metal song?