I'm a regular white guy but I really enjoy the 'black' mode of song worship, swaying and getting into it. But the question is, am I doing it just to feel good or is it happening by being by moved by the Holy Spirit, as King David was when he danced? Our natural tendency is to do something to feel good, and that in itself does not cut it with God. Cain offered his sacrifice doing the best he could and it was rejected by God but God accepted Abel's sacrifice because it was by revelation, revelation being something that comes from God. William Branham, who I believe was a man of God said 'why do you want to be healed, just to feel better?'. He goes on to say that that is not quite right our desire to be healed ought to stem from a desire to continue our service for God.