Slap works quite well in the right hands though.Unfortunately fashion, and bad taste(Imo) has lead us to this point. You don't hear us debating tapping, or harmonics in the same way. Its a shame, because in the right hands slap bass can be so musical. Of course I'm not saying this Marcus Miller vid is all that, its subjective.
Quite an aggressive/percussive style for sure. Its just another technique thats been used in the wrong way for a long many years.
[media]http://www.youtube.com/watch?v=NHdN_O5k3WM[/media]