Don't get me wrong, my favorite DCU character is Batman, but I've always liked Clark Kent better than Bruce Wayne. Clark Kent actually works a real job as a journalist while Bruce is kind of just a shadow figure behind Wayne Enterprises. We're not talking about Batman and Superman we're talking about Superman and Clark.
1. You'll see Clark Kent more often than Superman.
Superman
GiphySuperman is an icon. Clark isn't. You'd have to meet with Superman in the privacy of your home because if he's in a public area there will be many fans trying to ask him questions (and there's no way he'd say, "No questions, please, I'm eating lunch with my girlfriend," because that would start more questions and put a target on your back.) Clark would be able to enjoy his time with you. (Before he would have to change into to Superman to save the world, of course.)
2. Clark is a journalist.
Clark
GiphyThis means he at least tries to search for the truth and won't form any opinions until the absolute bottom line.
3. Clark is dorky while Superman has a more dominating personality.
Clark as a dork
GiphyI don't know about you, but dorky boys are so much better than guys with barely a personality. A guy that can make you laugh while simultaneously acting or inspiring you to act like a fool is a guy that's worth being with. Superman seems like the only thing he has going for him is the air of mystery.
4. Clark cares about his family.
Family Matters to Clark
GiphyClark cared so much about his adoptive father that he almost exposed his powers to save his father (Man of Steel, 2013). Clark didn't want to lose him, but his father knew it wasn't the right time for Clark to become Superman.
5. Clark doesn't have the world resting on his shoulders (or at least he doesn't show it)
Problem solving Superman
GiphySuperman has felt the weight of the world since he became aware of its problems. Clark only knows what he writes about. Other than the loss of his father he can be as naive as he wants.
6. Clark doesn't have girls throwing themselves at him
Loyal Clark
GiphyClark is a dorky guy, and Superman is seen as brawny; bringing strength to a town when needed. Superman wears a tight form-fitting uniform while Clark wears shirts that hide the brawn of Superman.