I've played as every class so far and I'm going with monk when the game drops.
Things I like:
- dark, brooding atmosphere
- beautiful art, they nailed it
- fun and addictive yet simplistic
- I liked the stories and questing
- loot, loot, loot
- co-op is so fucking fun even if it felt like beast mode
on the flip side:
- I really don't like the difficulty. It's so...easy. I died, and I still had all my crap. This makes the game lose a lot of its edge, because when I played D2 solo, I'd think twice sometimes if I entered a cave thinking I may get massacred, and journeying to my grave to grab my stuff and fight them all over again gave me a lot of pressure. D3 has no pressure, at least based off the beta. I remember when I first played D2. I went into a dark cave in the middle of the first area, I was slaughtered. When I went back for my stuff, I was real nervous about my approach, complimented by the dark, menacing atmosphere. D3 has no hint of this.
- distinct lack of customization and number fiddling
things I'm neutral on:
- the skill system. I started out not liking it because it's not a skill tree - my preference - but the more I played the beta, the more I realized that while you get every single ability throughout the game, you - the player - have the choice of what you want to use base solely on your preference. Sometimes I'd like an attack only to detest it when I leveled it up, and the opposite would happen with attacks I previously DIDN'T like. I like that aspect of the skill system. What I don't like is that there is no longer any sense of risk in developing a character and I think that's real important in making an rpg. Don't make the game impossible with certain builds, making certain builds harder/easier to get through the game is a far better alternative.