It seems that he was rather a religious fanatic, although very able and intelligent to be sure. He seems to have had more intellect than his father,and to have been someone who would commit himself to things rather than go through everything with no loyalty, as his father did. He would have been very Protestant, and woudn't have had the tolerance that chracterized Elizabeth. This woundn't have been wise for England, at all. Who knows- maybe he would be known as ''Bloody Edward''?
He was more gifted than his father, although he was begining to imitate him ( not a good path), but while all Tudor Kings were showman, he seems to have had less potential than this father, perhaps he had more substance? He had a good upbrining, so he woudn't have been haunted by that, as Mary was haunted by how things suddenly changed so much after Anne Boleyn showed up on the scene.
And he had a more formed character than many at the age he died at, although some things may have changed. He wouldn't have changed in his protestant convictions. He most likely would have made a better ruler than his father, but perhaps had some bad traits too, like fantacism. He might have married anybody, but Elisabeth of France is a good guess. As for Lady Jane Grey, while some things might have been suitable about her, such as temprament, religious beliefs, age, and being related to royalty, others woudn't have such as her being nobility, and his desire to marry a foreign Princess, or at least realizing it would be better for his country if he did, and also together their religious fantacism would have been a bit much.
