You should look at all the skills at character creation,
See which ones you would choose,
And then you will see what will your character be.
For exemple, i will surely choose backstab, hide in shadows, daggers and dark way (cause i want to cast dark way spells)
So my char would more be an Assassin / mage.
I don\'t know if this method will help you a lot, but it may work.
Also choose your guild considering your and its aligment.
PS: You can be a sword man casting spells you know :]