It doesn’t matter what great idea you have.  If it’s any good, it’ll have critics.  They just kinda go together.  So don’t fret.  If you have critics, you might have some good ideas, but just having critics doesn’t necessarily mean that you have great ideas.  Unless you share them, we’ll never know huh?  If the only thing that’s stopping you is the fact that you’ll have critics – critics sharpen your thinking on your ideas.