2Pac recorded so urgently and continuously, and was so unpredictable, that his catalogue can surprise years after his death. On the bluesy, fatalistic “Smile”, he urges you to keep your sense of humour through life's worst; on the warm, Brand Nubian-sampling “Old School”, he fondly recalls the hip-hop of his childhood. He could be militant (“Bury Me a G”) or conscious (“Words of Wisdom”), and he was still somehow always Pac.