Many hip-hop fans, those who love rap -- hell, even some rappers -- have an aversion to gangsta rap for its objectionable content. Common named the rise of gangsta rap as one of the many steps in hip-hop's downfall in "I Used to Love H.E.R." -- a sentiment that, of course, began a contentious relationship between him and Ice Cube. But whatever your take on the morality of the genre, it's hard to argue how insightful the music has been, or that each of these albums has impacted the landscape of hip-hop forever. Keep reading for a list of the ten essential gangsta-rap albums.