Add the poll tag automatically to any poll thread

This is something we can look into but generally speaking, polls and tags aren't very popular features here.

How can I tell which features are popular and what they are?

cybercavalier wrote: ↑ How can I tell which features are popular and what they are?

There's no list or anything like that if that's what you're asking. Some things you can tell just from using the site, other things would require us to investigate like looking at stats that aren't readily available.