I like to be allowed to create my own bassline. If the writer wants me to change it, and can communicate that clearly, I'll change it. That person wrote the song, and I have to respect the sound they're looking for and try to give it to them.
I once brought a song to a band (the all-female one). Its the one actually good one I wrote. The rhythm guitarist/band leader could not get it right. She refuses to use anything but a folk strum, and this was rock, with strong punk influences. The other two guitarists tried to show her how to do it, but she *refused* to learn. She just put her back to me and told the band, "Cherie has written it this way, but we are going to play it my way."
OOOOOOOOH NO, YOU DIDN'T, WOMAN!!!
She was *completely* changing the feel and sound of the song, and she didn't *care* what I wanted! She totally changed the whole rhythm of it to *suit her*, without asking, and rudely, too! So...
We never did the song. If she wouldn't do it right, I was not going to put my song out there sounding like, in my opinion, crap. And that is exactly what I told her, in front of the band.
We broke up four months later.
Cherie