I was just wondering how mods decide which threads to sticks.
Does a thread qualify for being
-Useful?
-Popular?
-Original?
-Helpful to the moderators?
-Informative?
-Largely used?
All of the above. There are no formal criteria. If they are useful and full of FAQs, they get stickied. We've gotten PM requests to stick certain threads; sometimes we do, sometimes we don't.