The communication issue becomes important so that everyone in the band knows your needs and quirks, and you know theirs. This is the best way to avoid blow ups. Let me illustrate my point a little better here. Let's look at a dialog between a guitar player and a bass player who are refusing to communicate. Here's how it goes.
Lets look deeper at what is really happened here.
When the bass player hears that song it makes him sad, but the guitar player doesn't know this. The guitar player, on the other hand, was in a band once where every song he wanted to play got shot down and he is still bitter about it. Being that these two musicians brought emotional problems into the band with them, the band is now ready to break up over an issue that could easily be resolved. By talking it over, being open and straightforward about your feelings, the break can be averted. Let's look at a tolerant conversation on the same subject.