I had taken a pretty extended break from this (due to the massive amount of lag/freezing), and started playing again the other day. I had already finished the main quest, so now I'm finishing up the Thieve's Guild and Dark Brotherhood quests.
They're both better than the main story, IMHO. Especially the Thieve's guild.
I'm probably going to grind out the rest of the trophies, I think I have like 10 left to get, then pack this one away until DLC time. I'm so hideously overpowered that I've completely gone back to square one (at level 46), using shields, archery, sneaking...
My "off the top of my head" specs:
Artos
Level 46 Breton
100 smithing, enchanting, one handed
70 lockpicking
89 Destruction
65 conjuration
90 speech
75 illusion (thanks, muffle!)
30 archery, light armor, sneak, block
18 2 handed
I was rolling a one handed battle mage for pretty much the whole game. My daedric sword, Coldfire (135 damage, 50 pts cold damage, 50 points fire damage) in one hand, Ice Spear in the other....after conjuring my frost atronach. I just changed armor after about 40 hours using double enchanted daedric armor (my armor rating was near 600) to dragon scale armor and the Nahkriin dragon priest mask (+50 Magicka, -20% Restoration and Destruction Magicka cost.)
I've been using the Conjure Battleaxe a lot lately, trying to get my 2 handed up (leveling up those lower levels makes you level up faster)