No real way to define this, but more than just 'really good music'. For me I'd qualify music I'm obsessed with as songs I will listen to on repeat for frigging hours until I burn myself out on them for a week and proceed to almost never listen to them again.
Don't have one ATM, really, so I'll just post some past favorites.
https://www.youtube.com/watch?v=a_XgQhMPeEQ
https://www.youtube.com/watch?v=Rr8ljRgcJNM
https://www.youtube.com/watch?v=R0bDSpBGEXk
https://www.youtube.com/watch?v=dKMTu1GDi_w
https://www.youtube.com/watch?v=kiSacFpkzoo
https://www.youtube.com/watch?v=gshG_fDevz0
Don't have one ATM, really, so I'll just post some past favorites.
https://www.youtube.com/watch?v=a_XgQhMPeEQ
https://www.youtube.com/watch?v=Rr8ljRgcJNM
https://www.youtube.com/watch?v=R0bDSpBGEXk
https://www.youtube.com/watch?v=dKMTu1GDi_w
https://www.youtube.com/watch?v=kiSacFpkzoo
https://www.youtube.com/watch?v=gshG_fDevz0