What Makes You Comment?

So, I have been around on this site now since 2003 and some of my art has lots of comments, while others have none at all.

So, I'm curious...

What Makes You Comment?

Is it a random thing when you discover something you like? Or are you the kind to 'appreciate', fave' and run? Maybe you only comment on artists you talk to a lot, or those who comment on your work? Or maybe you comment just on what's popular?

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