At the time DS1 came out, I was really impressed how you almost never had to load areas since they did that on background when you got close to new areas.
I loved the idea of a literal mule character to carry all your loot, and looking back, I wish more RPGs and MMOs tried to do the same thing. Even nowadays I don't see anyone trying the same. Inventory management was also great, you had equipment with varying sizes, but it automatically sorted it out for you. The only other hack & slash that did that at the time, if I recall correctly, was Throne of Darkness. It's a good way to limit player hoarding, remove player inventory management time and avoid blizzard's fucking one item one slot inventory bullshit.
Secret areas were fucking fantastic since you had to actually pay attention to your surroundings and find hidden switches.
But the game had shit combat, which is understandable because you can't really make a real-time hack & slash with 8 characters have deep mechanics. That's the game's biggest problem, but it's still a great game. The expansion is just more of the same with new monsters and maps.
I didn't have the chance to play online at the time it came out, can anyone tell me if it was good, mediocre or bad?