For me, one of the main factors that got me into 5-boxing was the prospect of doing PVE instances on my own. Since the release of BC, my work schedule has been so that I cannot raid... EVER. I have a stupid rotating shift schedule, so I wanted to 5-box in order to do alot of things "solo" when I did have time to play.

I am also intruiged by the complexity of how to accomplish these setups. I'm still fine tuning my macros and button placements, and I'm sure I will be for quite some time.