
Smallville has already gone on well past the point where it could seriously be considered interesting. It must surely be in it's final couple of seasons now, as even The CW can only milk a dead cow for so long ... the time has surely come to analyse this show, how it compares with other recent incarnations of the character and overall what it has brought to the superman franchise.
I thought this would serve as a critique on the shows shortcomings, but it turns out that it actually holds up surprisingly well against the other incarnations. Let's take a look at some key areas:
Clark Kent
All things considered Tom Welling has done a pretty good job overall, and it was interesting as this was his first big role and you could actually see him learning to act as the seasons rolled on and on. He probably did a better job of bringing across the small-town charm of Clark Kent than any other portrayl I can think of, so that definitely earns the show some points, but he wasn't nearly nerdy enough to be consistent with previous versions of the character.
You could argue that Christopher Reeve played the best Clark Kent, but what he actually played was Superman playing Clark Kent. Smallville, like Lois & Clark, holds that Clark Kent is the real man and that Superman is the invented character (a character which still hasn't even appeared in the show, I might add). Tom Welling is probably the best Clark Kent that has appeared on the screen so far.
Lex Luthor
This is another area in which the show excels itself, and quite often I found that the only reason I continued watching Smallville was for Michael Rosenbaum's performance as Lex Luthor. His portrayl showed so much depth, and the character was often so well-written, that at times it actually seemed a bit inconsistent with the overall quality of the rest of the show.
Gene Hackman's performance as Luthor never screamed of depth, and Kevin Spacey was just annoying. You could argue that Smallville was actually the first screen interpretation to take the character of Lex Luthor seriously. The addition of his father Lionel Luthor, played by Jonathon Glover, definitely sweetened the pot. Once again, Smallville holds it's own against the other supermen.
Lois Lane

Okay, so this is where the show starts to let itself down somewhat. For the first few seasons, Lois Lane didn't appear in the show at all and instead we had Lana Lang and Chloe Sullivan, who pretty much possessed the combined qualities that make up the Lois character. Then Lois shows up all of a sudden, which causes a problem for the writers since they've already spent three years establishing that Lana is the love of Clark's life.
Instead they just decided to have the two characters playfully dislike each other, which might have worked if Erica Durance didn't come across as so annoying. The character doesn't bring anything at all to the show, which is odd since she's supposed to be such a huge part of the Superman universe. Give me Margot Kidder, Teri Hatcher or Kate Bosworth any day.
Special Effects
Smallville has always been quite impressive in this regard. The quality of special effects that have been gracing our television screens in recent years have really been something, and this show is no exception. It doesn't measure up to the massive blockbuster Superman Returns in this regard of course, but for a TV show it competes pretty well by producing quality special effects on a weekly basis.
Irony

Lets face it, you can't have a take on Superman these days without a healthy dose of cleverness and irony thrown in ... Richard Donner probably did the best job of it in Superman I & II. The first season of Smallville laso did extremely well in this regard, with twists and turns such as Lex being best friends with Clark, the love of Clark's life just so happening to have a treasured kryptonite necklace which she wears at all times, Clark being kidnapped and having an 'S' painted on his chest as part of a high school prank ...
Since then, the show has suffered from something of a multiple personality disorder in this regard. At times it can be extremely clever, and at others times routinely dull and low-brow. It's never quite got back up to the level of its first season, which is a shame. But it was super while it lasted.