Humm i see. I like more the self found aspect too. Is the grinding part best done by running bosses or areas? Is the difficulty level similar to d3?
The endgame is basically broken into different activities based on what you’re after.
Experience: run pits or infernal hordes
Uniques and uber uniques: run pinnacle bosses
Masterworking materials: run nightmare dungeons or infernal hordes
Glyph upgrades: run pits
This season there is also a seasonal mechanic area that’s good for finding all your aspects and seasonal jewels.
Generally game difficulty is pretty easy and measured unless you want to push the absolute highest tier pits. Pits are basically like D3’s greater rifts.