Subwoofer placement

There are so many different ideas and opinions on this. Corner, center between the mains, side walls.

What have some of you found works best? Sit the sub where you sit and crawl around the room looking for the spot where it sounds best? Or just stuff it in a corner?

Finally, do subs with automatic room equalization functions render placement a relative non-issue?

Revamping my room, looking for some thoughts. Thanks!