2000s and early 2010s were easily the best. Dance and pop blew up in a way that the world will never see again with anything. Lady Gaga, Katy Perry, Pitbull, all these people were blowing up on youtube before youtube was even that popular. With music production software/hardware also blowing up during this time, there was so much opportunity for really innovative, catchy shit. The worst? Probably the 80s or late 2010s. There's something so cringey about the culture from back then. Probably the mullets or something idk. Speaking of cringey, don't even get me started on mumble rap. I think people forget that just because something sounds interesting or different doesn't necessarily mean it's good. That especially goes for mumble rap and recently released deep house.