(Besides tagging based threads, of course. =‿=)

Notice over my time here that a certain number of thread topics that have a habit of popping up again and again in one form or another. Which got me wondering ones I thought about it:

"Which you'd be most likely to see when you check out what's going on in the e621 forums if the tagging threads weren't apart of the equation?"

So doods, If you don't mind me asking.
What thread topic have You notices the most that just keeps coming back? ╹‿╹)
(Given enough time.)