Soldato
The only thing we've learnt about Luke is that he's a whiny farm boy who god only knows becomes one of the most powerful jedis of all time.
One of the biggest mistakes the empire made was killing his auntie and uncle. Had they not done that, Luke would have stayed behind on the farm for another year which would have suited his character a lot better.
He's an idiot through and through. Always has been, always will be. How Anakin produced that offspring I don't know! If I was Vader I'd have lied about him being my son. What an embarrassment.
To be fair Vader did try to rectify that with aborting Luke in his 23rd year with a lightsabre doubling up as a coat hanger.