So according to the lore, which is more right? Skyrim, or Oblivion? Were we born under signs or are we to travel to stones?

And if we are born under them (like a zodiac), then... what about the Serpent?

The Serpent is a traveling constellation according to the wiki. Does that mean you can be born under the serpent AND another constellation?

The way I understand it, being born under a sign is something special and not every person in the world of Nirn is gifted with a birthsign. It just so happens that the heroes of Morrowind and Oblivion were born under a star sign.

Oooh that's interesting! I'll have to look into that... So the signs could possibly be not even there too!

Exactly, if you look at oblivion npcs they all have classes and factions like the player but they don't have birthsigns.

Everyone is born under a starsign. Not everyone gets granted magical abilities, though. Same with the Guardian Stones: everyone can visit them, but not everyone is granted anything by them.

Also, Oblivion had the stones too. They were called Doomstones there, though. And just like in Skyrim, not everyone would be granted abilities by them.

In fact, in Oblivion, if you listen to the lectures being given at the Arcane University, you learn that the Mages Guild is divided as to whether the stones have any power at all. So it's safe to assume that hardly anyone is granted abilities by them.