i like bone thugs 'n harmony because they actually make GOOD music. they do have too much "fuck the po-po" mentality, but you can play ANY of their songs and pretty much chill to it while the melody rings thru your ears. for example, get high, and i mean a really really strong buzz, turn the lights off, lay down, and play the song BNK by them. the intro is trippy as hell because of the sound volume being transferred from right speaker to left speaker and vice versa.
may i introduce Jedi Mind Tricks. If your into underground hiphop with SAVAGE beats and (old) Company Flow style lyrics, listen to these guys.