I play Diablo 3 on console (ps4) and absolutely love the game. After I finished the game I thought the story was over.
However, that's not the case. There is plenty more left to do like rifts, quests, greater rifts, and so much more.
I find it fun that you can meet people, find items, make your own, and enjoy the adventures Diablo 3 has to offer.
Also, there has been talk about Diablo 4 being worked on. That will share the same features as "World of Warcraft".
Basically, it will be Diablo 4: World of Diablo (MMORPG)