While listening to good kid, m.A.A.d. city for the millionth time, I realized that there is a definite lack of guest-verses on the record. The tracklist only lists five other people on his songs. This seems like an anomaly, especially today, when almost everything feels collaborative. Channel Orange was kinda an R&B version of this: three guest-spots on the whole thing.

My question: what are the best examples of hip-hop records where it's almost exclusively one guy on his own? Which do you prefer?