Music is very important, even more than graphics in my opinion. I wish the music from Divinity 2 could use a lot of voice, violin, and acoustic guitar. It must be epic, original, just like in Divine Divinity, Ultima VII, Heroes of Might and Magic V,Final Fantasy VI, etc.
Voice acting is very important too. I like the voices in Divine Divinity. Unfortunatelly most of modern RPGs have terrible voice work, like Oblivion and Gothic III to name a few.
Good luck on the development of Divinity 2. It'll be the RPG of the year, I'm sure
(if it's 2009, there will be an epic fight between Divinity 2 and Dragon Age: Origins).