My first character was a rogue/archer, whom I skilled up in Marksmanship, One-handed, sneak and pickpocketing. I played this character to level 19, and completed the thieves guild, and focused on exploring the world, while I didn't focus on the main quest at all.
This got boring after a while, so I decided to make a new character.. This should be a mage. Since level 1 I've used only two skillsets, Destruction and restoration... and it's awesome!
Kill entire cities if you will, and if you get damaged, you'll heal to max hp in a few seconds.
I completed the main questline, and the academy, and I'm currently level 16 or so with my mage, so still a lot to do, I hope
And for the record. I played as a stealth-archer in Oblivion, yet, Skyrim has so much more to offer for a mage IMO
