That's interesting because my experience was the opposite. I had all but quit playing guitar by the early 90s because I wasn't hearing anything that moved me. Guitar playing seemed to have turned into an athletic competition. Every week there was a new stud playing a million notes a minute on a pointy guitar, often in the context of a sappy hair metal ballad. Nirvana brought emotion and energy back to rock music. IMHO of course.
i was delighted when Nirvana killed all the hair metal bands. oh, happy day.