I started my mage back in The Burning Crusade with the intent of playing arcane. Arcane wasn't really a feasible leveling spec back then, though, and I ended up switching to frost around the time I hit Thousand Needles. The moment I got my first real Shattered Frostbolt off, though, I was hooked. When my mage hit 85 in Cataclysm, all I wanted to do was stay frost. Thankfully, we were into patch 4.2 by this point, and frost was moderately PvE-viable at the time.
When it came time to test the beta version of frost out this week, I had high hopes. Despite my mage being fire for most of DS, frost still feels the most familiar to me, and I was able to slip back into it fairly easily. A lot of the core feeling of the spec remains unchanged, with Frostbolt, Fingers of Frosted Ice Lances, and instant Frostfire Bolts comprising much of your core rotation. There are some real noticeable changes, however, and a lot of them are for the better.