the Virgin flair is to be over the top, immature and to act hypoxic.
Well, that's what it was like on my first and last Virgin Blue flight!
They even got a passenger up to do the safety demo! (there are times when you need to be serious and this is one of them). Also, vary your jokes (if you're willing to tell any in the first place), imagine being a business person with say three sectors with Virgin and hearing the same pathetic jokes on every sector!!!!