Also picked up D3 yesterday. Running a female Witch Doctor. In Act II, level 18.
Game is good. There are a LOT of awesome improvements from D2. It feels a little less like Diablo and a biiiiiiit more like AARPG stuff (which...is the designed purpose). Seemed so easy early...and then, at the first major boss fight against King Leoric, it actually got tough. Final boss of Act I in particular was nasty. The characterization...they actually finally made the generic characters have a personality. This is probably the best part - it's less of a "skip text, grind more" and actually interesting storyline-wise. Feels longer overall than D3 (although...Act I was fairly short in D2). The support characters are a great idea...honestly, you should be able to have all of them (3...I assume, as that's how many I have now) active at once. Would be great, and give a neat party aspect to single-player.
The fact that mage stats now actually impact damage is great. Lots of different skills, and, so far, a reason to change them around. I actually CARE about armour defensive stats now, because enemies actually are intelligent enough to go attack your character and not your meatshields. Especially bosses! Holy shit less micromanagement of town portal and identify. Also, awesomeness incarnate - more relative inventory space! Holy shit! Also, buying weapons (i.e., crafting) gives money a use. And now money is a decent commodity, instead a dump for rings. On the flipside, stuff sells poorly, so it's not worth picking up anything but magic items and money now.
Bad stuff...while I don't care about it myself, there should be an off-line single-player capacity. Don't like health potions having such a cooldown...but on the other hand, they are immediate-acting...but so were the D2 ones. Enemies are rough, and some of the unique specials are brutal (although for good reason - they're used intelligently, and make teamwork more important) - Waller and Vortex and Jailer are nasty attributes, as they limit your ability to kite. I'd like to see a bit more individual customization (maybe +3 stat points per level to distribute how you want in addition to the automatic 5), but otherwise, pretty pleased with the game. It is fun, addicting, and clears some of the dumb stuff from D2. Decent story progression, and holy shit sidequests. I did Act I in...8-ish hours? And I still found out I was missing out on half the dungeons and a bunch of sidequests. Holy shit.
So yeah, when I get back from St. John, anyone up for teaming up? I wish it were more than 4 people, but...