According to the class personality quiz, that is:

Answer all 40 questions from the Arena quiz here: http://www.uesp.net/wiki/Arena:Character_Creation

Divide your answers by 4, then compare the numbers to the Morrowind result table here: http://www.uesp.net/wiki/Morrowind:Class_Quiz

I consistently get Witchhunter, probably because I'm so clever and I "think like a Witchhunter!"

I got Thief.

today, i was an archer.

I always answer these from the character I intend to make's standpoint "Chaotic Neutral" "Lawful Evil" etc. So I don't get a consistent answer. If I answer for how I personally would respond, I get:

Spellsword. Interesting! That's actually a class I pick pretty often, along with Nightblade.