The only fun for me in this game is purely nostalgic and have nothing to do with the current game. I'm lvl 120 and had no interest to level up to even 121 even when the entire game was free last year xD
Sight seeing old landmarks and soloing old instances is kinda fun. I usually go to reflecting pools to do various ancient history quests.
PS. I do this maybe once a month or two months to satisfy my nostalgia. The community and what's left of the old whales and trolls are worse than they've ever been. Just look at the official forums and you'll see the usual suspects like that 115 y
