Combat is fun and once you're used to the feel of it, it's comfortable

the world is fun to explore

having such a toned down interface really makes it more immersive

the quests feel like elder scroll quests, instead of the generic go kill 20 boars, it's go into this cave and find out what's there (there are exceptions obviously)

Class customization, being able to do what I want with whatever class.

Players are so far friendly

Vampire and Werewolf

fully voiced (so far, I'm only level 16)

The travel times are reasonable, not so long that I feel bored but not so short that I don't see the world

Each of the classes have their merits and I can say I enjoy them all for different reasons

While modified for an MMO experience, you do get the sense that you can wander the world and find things to do to level up just like an ES game