For me I'd have to say it would be the storyline, and the animation that goes into the characters, environments, etc, that makes my day. As well as the skills and attack power, (making sure that they aren't over powering and or under powering). I look for also equipment balancing whether they changed your stats to match…
I can't wait to seek duke it out in the dungeons in Neverwinter, I look forward to what adventures awaits us. Also waiting to see some epic and or unique storylines. Yay, yay ;) ;)