I love it when you discover a cool artist, and then proceed to follow them and shortly after they follow you right back. Or when they start following you and you see their work and you just kinda go wow you have some awesome art there I'll just click that watch button right there.

And it's just kinda this sort of little nod at each other like, yes, I do like your art, I'm glad you like mine, let us be mutual watchers henceforth.