Im not big into the 60s, too many singer/songwriters. Dont like the guy singing a message while strumming the same barre chords and open chords on acoustic guitar while the drummer keeps a metronome and the bass follows along with root notes : p The 70s had some cool music though.
The 80s were actually kinda cool, alot of people look down on them but I liked them. Im a fan of like Joy Division and The Cure and The Smiths to a lesser extent. They all played well and had really cool music.
I cant pick a favorite era of music, cuz theres too much to complain about them : p Alot of people I know say the 90s, and while I think alot of it was great, it was pretty darn focused on guitar and sad singer : p