Possibly the only reason I got Wrath of the Lich King: Rhinos.
I think you'd have to a Hunter (and probably a beastmaster) to understand the obsession Hunters in Warcraft have with taming the right pets. Whilst Warriors may obsess over getting the right gear and weapon, Hunter's obsess over getting the right pet for our needs. This here Rhino will be my tanking weapon, but he has a nice AOE knockback for PVP as well. I already have 2 cats, one core hound (but perhaps a two headed hound counts as two pets?) and a silithid, so I can't tame anymore, but this latest addition rounds out my collection quite nicely.