You are right that a lot of people make the mistake of avoiding criticism / disagreement... healthy discussion and debate are awesome. That's something I enjoy a lot about my band right now, we are able to discuss ideas that we don't agree on without getting worked up about it.
They say the best friendships happen when people disagree in small ways on a regular basis - as opposed to the ones where people never disagree about anything.
Its healthy to disagree on certain things as long as everyone knows its a disagreement any not going to break friendships like you see so often with bands :)
As much as I hate chaos @heymattsokol has a point we need to be with people not our look alike to get better pictures of ourselves