On a personal level, this is so awful, you don't want anyone to get to the point where they feel like ending it all is the only option, and I feel terrible for his family and friends. It's just very, very sad.
On a musical level though, I don't feel the sense of loss I felt when Cornell passed, or when Bowie passed. I always felt that nu-metal, or whatever you want to call it, was the worst thing to happen to mainstream rock music. Mainstream rock music essentially ceased existing after nu-metal faded away. I never, ever liked it, and thought much of it was artistically bankrupt.
Having said that, I also always felt that there multiple tiers within the nu-metal thing. You have those who I found truly offensive - like Limp Bizkit, Papa Roach, future senator Kid Rock, etc. And then you had another group, which included Linkin Park, and also Korn, and some others, that, while I still didn't care that much for them, were still like Mozart compared to the first group, and were worth checking out at they very least.
I certainly remember some of those Metora singles from the summer of 03.
In any case, it's just an extremely tragic thing. R.I.P.
