Been playing this for past couple of weeks.
Couple of reasons why I played D3 again was because of new season 4 and patch 2.3
Last time I stopped just before season 1 start (i think mid year 2014), then i gave my friend to try the game.
IM ENJOYING IT A LOT!
There are many reasons, I will list it down here.
1. Game are now more streamlined. I dunno how to say it, but now it feel simpler to level up, doing full act bounties and farming rifts. Each method have its own pro / con.
2. Gearing up are much easier. Only way I gauged this is by comparing my new char with my old one. Based on greater rift level and player stats, I would say that overtook my old char with much little time taken. Last time it took 100 hours solo, stuck at torment 2, but now I did around 24 hours. 4x faster.
3. Season journey. While some pro player know exactly how to farm / gearing up to reach highest greater rift level, Im usually quit game once i feel the game a bit grindy. Usually when you feel that after you spend many hours, you dont get any progression. But with season journey (aka seasonal achievements), Im now have a target to aim for, making the game much "meaningful".
4. Drops and crafting. Now with ancient-gear, crafting also become more useful. I no longer need to craft rare because now I can create craft sets / legendary after I completed couple of bounties runs. Not to mention that new kanai cube have couple of crafting recipe that super useful and versatile.
5. Kanai cube. Powercreep is real, if you found any legendary with weak stats, but with powerful legendary affix (example, ring of royal grandeur), you can use kanai cube to extract it and permanently "equip" the bonus without need to wear it. You have 3 slots that you can use.
Probably I could list the details more here, but I really cant believe that I actually enjoyed grinding in d3.
Usually I stopped caring once I feel like I stucked at same level.
If I wanna recommend people to try d3, this is the best time.