Breakfast Topic: Would you trade?

An interesting hypothetical question came up in guild chat recently. When new to WoW, you have to make a decision that can persist for months -- the decision whether to go Horde or Alliance. I've met players who frequently switch sides, and others who have never deserted the faction they chose when they first ran the game.

What if you could switch? Trade in a level 60 of one faction for an equivalent of another? Would you do it, and why?

I'm not sure that I would; I personally enjoy seeing new scenery from both sides, levelling up through both factions. I know some players who role-play would love to, for example, turn a human into one of the Forsaken, but somehow I don't think it's a game feature that's ever going to happen.