I personally like wood elf, but it's just a matter of preference. But be sure to join the dark brotherhood, not only do you slaughter people for fun, but you also get to leep anything they had, awesome armor, and you get paid for it
Breton. The can do both warrior stuff and mage stuff very easily. And then building up Thief skills is easy in this game, so you can basically do it all with a Breton.