His Excellency Aethien wrote:
In short: There's no reason other than irrational clinging to a spec not to go with what gives you the most DPS.
In my particular case, it was more a case of irrationally wanting to throw a spec as far away from my toon as I could. I played Arcane for a year and a half in Wrath, until I switched mains to my druid. If you don't understand why people have a preference for one spec or another, I'm not sure how to explain it to you. All I know is, is that I am very far from alone. There are a lot of people who are unhappy with Arcane's rotation and play style. Just that the majority of people who play mages want to squeeze out the most DPS they can, and/or have no idea that Frost is actually viable as a PvE spec. I can't exactly say I blame them really. Frost hasn't been a viable raiding spec since Molten Core after all.
I just wish Blizzard would separate PvE from PvP completely, and make is so that every single spec in the game is viable to raid with. Different strokes for different folks after all, and it's stupid for people to be punished or ridiculed for playing a spec they enjoy.