I voted 1 because I find the openness and choice in following the game in any way I choose to be outstanding, compared to most games. There are no real restrictions ( except mechanical ) on what you can do, or what you choose to achieve, which, for me, is the real essence of what an RPG should be.

If it were a poll on implementation of mechanics ( which I consider much less important than the breadth of role-playing ) then I would probably choose 5 since D&D mechanics have never been particularly good, and 5e has regressed from some of the earlier versions. That said, I don't think there are many videogames that DO have good mechanics, which is probably why I don't care to dwell to much on how bad they are in most games.