If you were expecting a story driven RPG like skyrim, final fantasy or dark souls, its not what it is.

You aren't even really playing the game yet, you are playing the tutorial, which is a stupid easy RPG. The real game is called adventure mode. It unlocks after you beat the story.

That mode is a race car simulator with RPG and looter elements. The goal is to build your race car (character) to complete the most difficult track (greater rift) as fast as possible. There is a 15 minute time limit. There is a leader board.

To do this, you participate in the, "game play loop," of farming for gear and crafting materials then pushing into higher and higher greater rifts. Then farm those rifts to push even higher.

I personally enjoy it for a few reasons. I find farming piece to be relaxing and satisfying. I click buttons, watch big numbers flash up (my farming build hits regularly for 10+ trillion damage), everything explodes and I'm one step closer to my goal of clearing that next greater rift. I find the challenge of greater rift pushing satisfying. The difficulty in Diablo is basically unlimited. Its fun learning the in and outs of all the gear, all the multipliers, all the buffs and debuffs, all the mob types, all the map layouts and all the rift guardians. Using that knowledge to eek out one more rift is extremely satisfying. My newest push build cleared GR110 today and I maniacally cackled when the guardian went down because I'd been trying to clear it for 2 days and had come so damn close so many times.

The seasons add another interesting dimension of resetting the leader board every few months and throwing a wrench in the mechanics. Then the race begins back to the top!