Byrne's Superman tends to consciously pose, as well, while his Clark isn't the hunched over schlubb of old, or the dynamic dashing reporter, he's a fairly comfortable, but flawed yuppie-looking dude. He's just this guy.
I like that in theory, but in execution, Byrne's Superman/Clark annoyed me. Especially when he was so weak-minded, executing some criminals gave him a split personality that would go punch poor people's teeth out in the ghetto of Metropolis or whatever. (But also so strong-minded he, but not Barda who grew up heroic on friggin Apokalips) couldn't be brainwashed into porno.)