Best line in the entire series
In the episode "Tempus Fugitive" after Lois has been nagging Clark about lying to her about his secret, Clark told her how frustrating it was to see her fawning over Superman while ignoring him. Lois said "What's the difference, you ARE Superman".
Clark told her "Lois, Superman is what I can do, Clark is who I am". The best description of Clark and Superman ever.
I spend my money on dope, sex and cheap thrills.
The rest of it, I waste.