I mean specifically the more avant-garde stuff based around things like feedback loops, distortion, and white noise, like Merzbow or the Incapacitants. I personally consider it valid as music, but exploring different techniques and sensibilities than "normal" music.
Any noise groups/musicians y'all like?
I like noise when it's used in more alternative bands, like when Sonic Youth will end a catchy song with just the wildest feedback.
On its own though, without a melody or some kind of song structure, not a huge fan