My partner is addicted of playing Runescape, he even encourage me to play which I did. But, eventually it wasn't my thing so, I stop playing. I couldn't find any especial in this type of game.
Oh yes, I was playing Runescape a lot when I was a schoolboy and it was pretty indeed. At that time the game was already old and World of Warcraft was already released, I guess it was 2003 or 2005. But then I dropped it and started playing WoW with my friends.
Nowadays I play WoW less, but each time I start playing I choose different class. It's even easier to level in 2019 now thanks to services like this, and I wish a similar stuff existed when I was playing Runescape with buddies. But oh well.