Def Hard to Earn and Straight outta Compton, JMT-Violent by Design, some Beastie Boys albums and some Jurassic 5 too. Bone Thugz - Faces of Death as well, its really their only good album.
Not long like 5 minutes. I just googled alphabetized hip hop albums and found artists that I liked regardless of the music on the said albums. I thought it was a good way to tell this guy that there were only like 45631564165341 threads about this with out pulling the cliche "SEARCHBAR" on him.
illmatic-nas
no need for alarm-del the funky homosapien
3rd eye vision-hieroglyphics
the infamous-mobb deep
ATCQ is also really good, none of those are really MUST owns, but they're just cd's i have from the 90's that i like