This one hit me particularly hard. I love the Foo Fighters, especially Dave and Taylor. I've read Dave's book(and his Mom's), watched numerous interviews and concert videos with The Foos, Dave and Taylor and Taylor by himself. As a singing drummer, I really appreciated his gift. Taylor was an exceptionally talented musician, involved in many projects in which, in addition to drumming, he sang, played other instruments and wrote songs.
He also seemed to be a great human being, judging by the tributes that have circulated since the announcement.
The relationship between Dave and Taylor was inspirational. I can't imagine what Dave is going through now and I wouldn't be surprised(though I would be sad) if he decided he just couldn't play publicly anymore without his "brother from another mother" behind him.