My question to first season Clark would be:
Why didn't you use Superman to tell Lois of your suspicions of Luthor long before things got serious between the two? Star-struck Lois would have been investigating Luthor before you turned for the window to leave.
My question to late second season Clark would be:
I know ABC muzzled you, but why didn't you tell Lois who you are? You'd rather lose her than tell her even though you knew she was definitely interested in Clark?