The Daily Grind: What’s the ideal rotation length in an MMORPG?

Back in July, in the comments of the argument over World of Warcraft’s rotation assist button, MOP reader Greaterdivinity linked the classic Cat Raid DPS Flowchart meme, and I was so grateful because it was the perfect way to illustrate the extremes that have everyone so upset. Even if it works well, the idea of a single button seems depressing, but we don’t really want to be contorting like Cirque du Soleil acrobats to kill some brigands, either.
So let’s hash it out, shall we? What’s the ideal rotation length in an MMORPG? How many buttons should you be expected to push in a typical MMORPG fight?
Every morning, the Massively Overpowered writers team up with mascot Mo to ask MMORPG players pointed questions about the massively multiplayer online roleplaying genre. Grab a mug of your preferred beverage and take a stab at answering the question posed in today’s Daily Grind!