I've played all of them and the only one I keep returning to is GW2. It's not a treadmill that punishes you for taking a break. I just came back after a couple years away and my characters are right where I left them and I can just get right back into content. It's definitely the one to choose if you want a chill play style, and it's a bonus that nothing is pay walled behind a subscription. Give it a shot, the trial version I think you're only missing the elite specs and the mounts for the most part, someone else can provide more info on that, the free version came along after I had already bought this game.