I've never given any thought to the ratings boxes. I know what I think is a good picture and what I think isn't and I don't need a "popularity rating" to tell me what to think. I don't comment a lot and that's not something specific to this site. I don't comment at all the sites I'm on even the ones I moderate. If I see something that really strikes me as interesting or exciting or really needs improvement I'll say that. Otherwise I just sit here in my quiet corner silently admiring everyone's work.

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Of course that's just my opinion, I could be wrong.