Yeah, love the Deftones, personally Around The Fur is my favourite, followed by Adrenaline.
As for their catagory, they get lumped in with nu-metal cos they came out at the same time as a lot of other nu-metal acts and didn't fit in to any other catagories of metal. However, I don't think that really does them justice as they are a lot more original most other nu-metal bands.
Also, love Team Sleep, although I do tend to find that the songs tend to merge into one after a while. Good music to have playing quietly in the background to relax to, I find.