Stealth Everything. I enjoy skulking and will use whatever seems appropriate given the situation be it a form of melee, bow, or magic.
That said I favor the direct stealth assassination with either a dagger or 1h sword. I usually carry a small variety of daggers, swords, and a bow with various arrows, each with different enchants according to my whims. They're usually paired in a way so if in case I don't take care of them in the first strike I'll set them up to be weaker when we enter open combat.
I also really enjoy the long distance takedowns with my bow, but I'm horrible in open combat.
Magic is more a utility for me (Illusionist), unless I'm in Vampire Lord form. Then I devisate.