Interesting views on this subject. I'm starting to wonder if those who feel as strongly about the importance of critique, both giving and recieving, are as weak and needy as they accuse others of being, maybe even more so. Just a thought, but wow, some of the responses- Like some sort of strangoid defense mindset. I've had several critiques by professionals--photographers I have immense respect for. From my experience, you don't need more than a couple. It's far more valuable to develop your own judgement. If you want to learn, get a book and sit down and learn. Develop some discipline. This thread contains a near perfect example of what kind of person may be picking nits at your photos. You'll never please them. Their encouragement is superficial, a downward, never-ending spiral.
Anyway, I think encouragement is much more positive and productive. I believe that it is just as important to be able to discern empty praise from social compliments and that from solid encouragement. I don't just mean on the internet either. Encouragement comes in many other forms. Maybe in the form of references for a job well done, sales of photos for publication, a round of applause after a talk, a prize in a contest, and even, yes, even from those who love you. There ain't nothing wrong with that. As long as it makes you happy. Identify and know your audience. Develop vision and style.
Finally; there are some extremely good photographers on this site. Find them and study their work. For the most part, they say relatively little, so when you read something they've written, pay attention. That's about the best you can get online.