One of my favorite games of all time.
An action RPG (more RPG than ARPG, you mind), with an in-deapth storyline and good loot tables. They did a fantastic job with the atmosphere of each area, capturing the feeling of darkness and turmoil in each zone while keeping the individuality of each location.
The combat is challenging, and each playable character brings a feeling of uniqueness to the combat. The followers add support that (at times) is much needed. The loot system is decent, and upgrades feel exciting. Watching your gear change as you gain levels is as satisfying as it is in any other well-done ARPG.
As long as you're not looking to play this game with friends, you'll find DS3 to be a well-rounded, immersive game with a storyline that will suck you right in.