What is my favorite year in rock music history? It’s a question worthy of a ridiculous amount of thought, but the hosts of the podcast “Dad Rock” chose 1966 and 1991. The latter was of particular interest, because it’s the only one I actually experienced (at least as an adult); it was later heralded as “The Year That Punk Broke.” Alternative or “college rock” had been chugging underground for at least a decade, with plenty of interesting music coming out of the fringes. Even as 1990 arrived, a handful of independents were beginning to see airplay on commercial radio and MTV — Dinosaur Jr, Sonic Youth, the Red Hot Chili Peppers. But the broader audience was left believing that the musical universe revolved around “Cherry Pie” and Bon Jovi and Mariah Carey. So when this seemingly insane album somehow broke through, firing off heavy rounds of screeching, distortion, aggression and intensity — and dislodging Michael Jackson’s “Bad” from the No. 1 spot on Billboard’s album chart — the gentrified crowds in suburban America must have wondered what had plowed them over. Music hasn’t been the same since. Thank God.