Just one thing: Vampire in a rush deck functions as a decent finisher, since from the gem perspective it got the best damage to recource ratio. And most of the time when you want to play it it will be, for the rush deck, among the last 2-3 cards anyway, so the drawback is neglectable. (I prefer the two swift mages for the gem usage, but in a rush deck vampire is still a reasonable choice, it depents how ou build the deck.)
Anything else is quite agreeable.
Yeah, but he sat on the damn thing for the entire game from the first turn - even when he had lethal in his hand. I recall I screamed at the screen "YOU HAVE LETHAL, YOU IDIOT! PLAY THE FUCKING VAMPIRE!" and variations thereof for three minutes. Obviously Vampire is not for him when he is too fixated on the drawbacks to WIN. And even then, you shouldn't hold onto the Vampire for the last hit from your starter hand and let it keep a card slot full.