I also think it's extremely important to learn to critique yourself. Every critique I've received has been just as important to future songs than to the one being addressed--because I try very hard to remember what I've learned and to carry it forward. Otherwise, I just keep repeating the error.

No one will ever be "beyond the need for critiques"...even the Beatles put out a few stinkers that really should have been improved upon. But it's also possible to sharpen your own opinions about your own work. I say the harshest things to myself sometimes! ...things I would never write to someone else. But I think it's important to be as blunt as possible with our own work, or we risk fooling ourselves...but not others.

http://www.soundclick.com/MarkKaufman