Yes. Coming up with bad ideas is easy. It's important to have a good filter. In general, I think creative people begin many more projects than they finish, and often it's only once you get into the project a little that you can tell it's not really that great.
That said, in your case it might be worth taking one of your ideas through to completion just to have the experience of doing that.
That said, in your case it might be worth taking one of your ideas through to completion just to have the experience of doing that.