I always wonder about flare because I often include starbursts in my landscape shots when it is appealing to do so. It’s a simple and old technique to use a starburst. Simply close down and you should be able to get a result. Depending on if there is something between the sun and the camera, such as a cloud, a tree, a mountain, will change the starburst outcome. This was real popular for a while and then died off, it came back and is slowly going away again. That could be said about many things in photography.
So, Flare, is it good or bad? Everything comes back to the story. What you saw and felt when you took the photograph of course comes into play so I won’t bother to much with that point. I like to think about it more as does it help the image or does it hurt the image? A starburst by itself grabs the eye. It’s bright and dramatic. So is that extra flare needed under those circumstances? It’s one of those things that is hard to come up with a definite answer for and for myself I’m still trying to come up with one. If the flare acts like a guiding source then I think it can work but it really does depend on the other elements.