what do you think is best and WHY

PVE

You won't get much help from me lol

Cause I'll tell you it's the race you think looks the best, has the best lore, etc etc

I'm making an altmer, doesn't matter if I make it a sorcerer, a fighter, a rogue or whatever. I don't let racials influence me.

depends if its pure mage, most likely high elf. I mean High elfs are pretty great anything magic, but Bretons and dark elfs are very good mage hybrids. Like TRoclodyte said in the long run im not sure that racials really matter.

Doesn't matter. Racials are not that important. And what type of sorcerer are you rolling. Focusing on magic or Stam, whats your role gonna be tank dps or heals etc

Khajiit, because Khajiit are best race for everything even when they're not, because they are Khajiit.

Altmer, Dunmer, and Breton are the obvious "mage" races for each faction, but once enchants and soft caps enter the picture, it isn't a big deal. Just go with whichever race interests you.

(Hint: Not Khajiit though. They are pretty much the worst, even when they are not, because, well, they are kats )