I finally found a character that Im having fun with. Its a Breton full mage born under the sign of the Atronach.
I roleplay him a lot and I really want him to be a total mage and nothing else. The only thing he uses aside from magic is alchemy, so healing and magicka potions and poisons.
But now Im stuck. I dont know which attributes to raise during level-up. Intelligence is clear, but what else? Willpower is of no use to me, since I am an Atronach. Strength and Endurance don't fit to my character as a full mage. He is supposed to be physically weak. Agility is useless too. Speed could be okay I guess, but I dont want my character to get to fast so that it gets unrealistic. So I plan on stopping leveling speed at about ... 60? I dont know.
Personality is absoloutly useless especially since I use Illusion and have access to Charm spells. And Luck ... I wanted to take that but I read a bit about it and it seems to be not as good as I thought. The skill increases vanish after the skills reach 100 and other than that, theres only few things that are improved by luck. And beside that, it is also unrealistic to train luck. You have it or you dont have it. 50 luck seems perfect to me, because its completly random if you are lucky or not lucky.
So what attributes to level up? Intelligence will by the way have reached the 100 quite soon. Im level 3 and do already have 65 Intelligence, so considering I get +5 every level-up (I use Oblivion XP so I will) I will have maximized it out at level 10 and then I have no attribute left that I actually want to increase.