You aren't alone in your observations elflinn. LNC seems to be somewhat of the red-headed step-child of the Superman franchise.
Why, exactly, is difficult to explain.
There are a lot of theories out there - some say it's due to the marriage - some say it's due to the show's lack of "extreme" popularity (because let's face it - the show was popular, we're all proof of that, just not as popular as the "execs" would have liked).
I've never personally understood why "Smallville" receives more praise than LNC. It doesn't even prominently feature "Superman" - Tom Welling has yet to wear the suit. <g> And it has only been on, what, 2 more years than LNC? LNC had 4 - isn't Smallville up to 6? It's not like LNC only lasted for a season and then went on into obscurity...
But anyway, I'll step back down off of my soapbox now, and let someone else have a turn. <g>
-- DJ
Oh, and "welcome" - btw - I see this is your 2nd post and you registered in Dec. So I just wanted to say a little welcome to the boards.