My original character was going to be a sneaky archer type, but five minutes in to the game, I cast a spell and immediately found it more interesting. What could be cooler than shooting fire from my hands? My character is now a level 19 or 20, I forgot exactly which it is. Anyways, I'm a Breton mage. I'm about 3/4 through the main quest and have finished the College of Winterhold quests so I have the Arch-Mage's Robes, as well as Morokei's mask. With all my level ups and enchanted gear, my magicka is upwards of 350 and regenerates at 225% of its orginal rate. My destruction spells cost much less as I've invested a great deal in that particular skill tree. Once you get the Impact perk, dual casting destruction becomes pure ownage as it staggers your enemy everytime. With the combination of the Dragonrend shout and Impact, you can keep a dragon on the ground and not let him get in one attack, while you slowly chip away at his health. I also use conjuration and restoration quite a bit, conjuration to tank damage and restoration to quickly heal myself (and for wards once in a while). I enchant a lot of things and use Alchemy quite a bit to keep my potion supply stocked. Once I finish the main quest, I'll settle down a little and try out some of the other schools of magic.