Since you selected "rarely," you are sometimes judgmental when it comes to new ideas. Try to be more conscious of premature judgment and hold off evaluation as long as you can. You might be surprised at how many ideas look better in the light of a new day. You have nothing to lose and a great deal to gain.
During the fragile early stages of the creative process is not the time to test an idea's validity. Almost all new ideas have flaws. When you're too quick to judge, you often overlook what's worthwhile and drag down the entire creative process. Even if an idea isn't perfect, it's more constructive to look at what's good about it and keep making it better, rather than take the easy way out and drag it down.