All of them tbh, the only one I can't stand most of is the 80s, but there's still some good stuff lurking around.
From the turn of the century up to the 40s the only thing that really interests me is the Classical scene (20th century Classical saw some of the best composers ever), and a couple of jazz songs, after the 40s Jazz starts to turn into an amazing thing with Bebop and Hardbop (Charlie Mingus was the most amazing Jazz musician around if you ask me) and Modal Jazz afterwards, the 60s I can't say much of actually, I don't really like The Beatles or most of what was popular but In The Court of the Crimson King came out in 69 so there's that, 70s were amazing, Peter Gabriel's Genesis is def in my top 5 bands ever and the seeds of the Industrial scene were planted (Eg. Einstürzende Neubaten and a couple others) then all the great Prog bands mostly went to shit in the 80s but Charly García (the best Argentinian musician ever tbh) made his best solo albums in it and some Dream Pop that started sprouting up was really good. 90s were good, Shoegaze and Grunge I love and there were some amazing records overall, NIN's The Downward Spiral came out, which is another one for the top 5, and Marylin Manson was at his best with Antichrist Superstar, Opeth, Porcupine Tree and others also started putting albums out. 2000's acoustic Pop is my biggest guilty pleasure (KT Tunstall, Corinne Bailey Rae, etc.), mostly because it reminds me of my childhood. And today with the internet you can find basically anything which is amazing, even if you have to wade through all the shit.
Fucking loathe Trap though.