If it's up to me, I prefer Thurman's "celebration" -- hand the ball to the ref like "yo, what's up dude, it's just me again."
But people celebrate in different ways. I don't much care for Willis' horse-riding antics, and I have to admit I cringed when Biscuit or Bruce did their sack dances, but hey, that's them. As long as it doesn't draw a taunting penalty by being directed at an opposing player, let them do what they want.
I have a lot less respect for the Alvin Harper types who celebrate a mundane catch at the 45-yard-line as if they just scored the game-winning TD, though.