Definitely Clark Kent. I think the reason that LNC caught my attention, where other Superman creations hadn't, was that they made Clark the real person and Superman the disguise and focused the show on Lois and Clark.
I've never been much interested in the Superman rescue portions of the show and when it comes to superpowers what fascinates and intrigues me the most is how Clark - who desperately wants to just be a 'normal' guy - has to battle with them and what problems they cause for him, rather than the positives that they give him.
I'm always more interested in the powers causing him trouble or throwing up some hassle in his life and how he overcomes that.
Plus the ship, of course.
LabRat