Skyirm is very fun
I have done the Theives Guild, College of Winterholm and the Dark Brotherhood, so far, the College was my favourite quest.
My combat style:
Use bow on enemies on far distance, use invisibility I gained from Theives guild.
When enemy sees me, pull out lightning bolt. I have Archmage robes, Morakai and several other mage enhancing armour, giving me 100% more magicka that regenerates 275% faster than normal, also I am a high elf so have a naturally 50+ magicka points, also, if I use high born, my magicka regenerates 100% faster again, which means I have 375% faster regenerating magicka. Needless to say, I own as a mage.
I use sword sometimes though