Ok, with the new ending of ROTJ, don't you think Obi-Wan would be super pissed at Anakin? Look at it, Obi-Wan never turns to the Dark Side, so he has to spend eternity as an old man. But Anakin gets to stay forever young because he did.
And if you're Luke, wouldn't you be weirded out that your dad looks younger than you. He'd totally lose all respect for his father, and for good reason.