Dungeon Siege was, and I would argue, still is a shining light in action RPG's. I must have put well over 1000 hours into the game and it's multiplayer when it came out.
Hundreds of spells with characters not being restricted to one class type (Barbarian + Mage). The game was also sort of open world where you could wander off in a random direction and find lots of short cuts to different towns / areas.
When my character was finally able to summon a rock beast was a high point. Still is one of my favourite games of all time. Shame they forgot everything that made it great when they made DS2 and DS3