I've tried Fire, Frost, and Arcane. I just can't bring myself to stay arcane for more than one day. I really like fire and assumed I would it would be primary for me, but after running more than a few dungeons my frost spec is doing better than my fire spec by more than a little. That tip on the forums about using coldsnap right after doing deep freeze and Frost orb so you can cast both again right away ups the damage. I also like the rotation. It's more than just push a button. I keep three stacks of FFB up, I have it Glyphed, I use Ice Lance when Icy or Time Warp isn't up on FOF procs. use Pet Freeze when Brain Freeze procs or Deep Freeze is off CD. I really enjoy it and it's doing more DPS than fire. The crit rating stuff SUX for me wtih fire. Having to sacrafice to much Haste and Mastery fir Hit seems to affect fire more than frost. Of Course I could just be doing it wrong. Though, I did have an arcane mage in BH today whisper me about how I was kicking his butt using Frost. Frost seems to still suffer from the perception that it is way behind in PVE.