Great point PD, and one that works both ways. I've probably taken this thread to heart a bit out of frustration...
There are many knds of musicians, but for sake of argument, I put them in one of three classes:
The fun musician-These guys are the people that love music, love the atmosphere and the experience. If that experience is less than enjoyable, however, they will move on or worse, hold up progress in order to maintain the status quo-the "fun" experience. These are the folks that show up with a 12-pack and kill your rehearsal time talkng about anything OTHER than the job at hand. They are sometimes good musicians, but rarely work to get beyond the point they are at-I've even had guys that refused to learn new material-that would be like work.
The passionate musician-These folks are more dedicated, and understand that there is work involved in order to get anywhere. They take music seriously, and strive to make a statement. Yes, I do lump myself into this classification, and I am biased...
Then, there is the "artists". You described this group perfectly with the Amy Winehouse analogy. Difficult to work with, unappreciative of what they have, and yet, when it's time to bring it, they BRING IT.
The guy I referenced belonged in the first group, but thought he was in the third.
So, to me, the biggest question that any one individual HAS to ask him or her self is this: "Do I have the goods to back up/ overcome my actions?"
That's what bothers me the most about the subject...everyone seems to assume that the answer is always yes. There's a certain intangible that puts people on that level. I don't know what it is, and I don't have it. I'm amazed at how many people assume that they do have it.