Who I picked:
Clark Kent - Dean, of course. As said he had better writing for his Clark. Chris R. they made Clark such a bumbling nerd that it was over written.
Superman - again I picked Dean because I like his slightly more layed aback approach to Superman. Chris R then Brandon are my second and third choices. Mainly because of their height their does seem to be an imposing presence about them but I found them both a little stiff for my taste. I like Dean's softer approach.
Lois Lane - Teri hands down. I always thought Margot Kidder was miscaste. For me Lois should be strong yet sexy and feminine at the same time. Margot came off to manish in her Lois for me to believe for a minute that Superman would be attracted to her. Teri on the other hand played the confident Lois but also with a softer side that I could believe would attract Superman.
Lex Luthor - billionaire - John Shea. His Lex was sauve, sophiscated, cool, evil and without a conscience. However, he could lie about his true nature and come off as this caring, giving person. All the others were either underwritten, overwritten or just plain played over the top. No subtley involved with John Shea had. But when needed he could do over the top.