Well, Carol, I've sounded negative to the idea of a major change of Clark/Superman's appearance. But at the same time, I think such a fic would be interesting.
I really think we are too fixated on people's looks these days. Personally, I often prefer British films over American films, simply because the actors often look more "normal", more "average", less "perfect" and less glamorous in British films than in American films. And when the actors look more normal, the characters they play often strike me as more believable and real, too.
This reminds me of what a small boy said to his mom, after he had seen a number of movies and then accompanied his mother to a big shopping mall. He looked around, contemplated the people around him, compared them with the people he used to see on TV, and then said to his mom:
"Mommy, how come most people are uglier than most people?"
I think it would be interesting to meet a Clark Kent who is an average-looking guy, a "run-of-the-mill" person when it comes to his looks. Most of us are. Why shouldn't Clark be like that?
I recently watched a first-season episode of LnC, where we actually saw Jor-El and Lara put their baby boy in his spaceship and launch him toward the Earth. Jor-El and Lara both looked rather blond and pale, and I thought that two people who looked like them couldn't possibly have a biological son with Dean Cain's dark hair, brown eyes and olive complexion.
So please do write your story, Carol. It should be interesting to see Clark having to deal with the dual problem of being an average-looking, not obviously impressive guy, while at the same time having to keep his awesome superpowers a secret to everyone who laughs at him. Come to think of it, this premise sounds a lot like Jerry Siegel's and Joe Shuster's original take on Clark Kent. But I guess your Superman won't look as impressive in tights as Siegel and Shuster's Superman did.
Ann
