So, with all the MMO's following DDO, and starting to go Free To Play, if an MMO you used to play went Free To Play, would you consider going back to play it?

I used to play Ultima Online, the first major fantasy MMO game that ever game out. I also played City of Heroes/Villians and WoW. Out of that list, the only game I would consider trying again would be Ultima Online. It's been YEARS since I've played UO, and it would be interesting to see what they have done to it, providing I didn't have to pay for it.

What MMO's would you check out or go back to if they were free?