Okay. After doing some thought, I've come up with a breakdown for my version of Smallville, story wise:
Season one:
Starts with Clark Kentm a sixteen year old kid in Smallville, Kansas. Clark is becoming more and more aware of his powers as his already impressive strength grows into superhuman levels, and he begins to notice new sensory abilities such as X-Ray vision. The supporting cast of the series includes Clark's parents, Clark's history teacher, Mr. Jones, and Clark's friends, Lana Lang, Pete Ross, and Carl Draper. Clark and Carl's friendship would be slightly streigned, as Carl is prone to anger issues, and both share academic and athletic rivalries.
The series, at first, would be very low key when it comes to action. The first few episodes would deal with much more personal, down to earth subjects in the vein of the Wonder Years. However, as season one progresses, things would take much more dramatic turns. Clark would develope the use of his powers and share them with Pete, who would become his confidant. Clark would start testing his abilities by running around Smallville and the surrounding areas at super speed. His first ventures into super heroics would be his going into Kansas City while testing his powers and coming across such disasters as fires and gang shoot outs. This would draw the atention of the Department of Extranormal Operations, who's investigations of the happenings in Kansas would lead to some of the more action oriented sequences in season one.
The season finale would have Clark's first super fight. A minor character and classmate of Clark, K. Russell Abernathy, or K as he is called by his friends, would be testing small samples of Kryptonite found in Smallville (note: the meteror rocks would not be in vast abundance, and the samples K is testing would be some of the few in existance). After a freak accident, the Kryptonite transform's K into a living nuclear reactor. The last two or three episodes of the season would have K coming to terms with his powers and going on a small rampage through Smallville. Clark is able to stop him, and the DEO aprahends him. Clark is able to get away before the DEO can catch him, and decides to lay low for a while.
Season two:
Clark has started being much more careful about the use of his powers to stay off the government's radar. He still practices his powers and saves lives from time to time, but he's much more low profile about it. Mr. Jones, Clark's history teacher, takes on much more of a mentor role for Clark. The DEO plays a much smaller role, as they have a harder time tracking down any more of these "Kansas Sightings." Partway through the season, Clark is able to get his ship to operate again, and it begins speaking to him in the voice of his biological father, Jor-El. "Jor-El" recounts to Clark his true nature, and tries to teach him more about his powers and Kryptonian values.
As the basic plots often revolve around the personal issues of the different characters, the main season long plot line is Carl Praper's descent into madness. While he and Clark had always been rivals, Carl grows to greatly resent Clark, do in part to psychotic tendancies that Carl was diagnosed with at an early age. Carl, secretly, is in love with Lana, and when Clark and Lana begin dating, Carl completely snaps. Using his scientific skills and keen tactical and analytical skills, which show that he is a true genius, albiet a psychotic one, Calr sets in motion plans to destroy Clark. He learns of Clark's powers, figures out5 his weaknesses, and then kidnaps many of his friends and family and puts them in rather hgh tech death traps. When Clark confronts him, Carl whips out a small peice of Kryptonite (which he had taken from K's lab) and nearly kills Clark before Mr. Jones inaxplicably escapes from Carl's trap and subdues him. Carl is sent to a mantal isntitution.
Season three:
As Mr. Jones becomes more of a mentor to Clark, he reveales his secret to him. He is, in fact, J'onn Jonzz, the last survivor of the long dead Martian people. He, like Clark, is an alien, and the last of his kind. J'onn ends up introducing Clark to other "heroes," such as Alan Scott and Jay Garrick. As J'onn teaches Clark about using his powers responsibly and for the sake of his adopted homeworld, "Jor-El" tries to convince Clark that his loyalties should lie almost entirely with Krypton. To this end, "Jor-El" projects mental images of Krypton's gorious history into Clark's brain. These flashbacks will take up at least one episode. Maybe two.
It is eventually revealed that "Jor-El" is in fact The Eradicator, a Kryptonian military AI that the real Jor-El reprogramed to preserve Krypton's heratige by protecting his son. However, The Eradicator's programing evolved, and it decided that the only way to preserve Krypton's culture was to force the people of Earth to loive by it, terraform Earth into a new Krypton, and genetically alter all humans into Kryptonians. However, because of the centuries of social, scientific, and political advancements made towards the way Krypton was before it was destroyed, to imediately force Earth to follow such tennants would involve enslaving the human race and removing all free will. Also, the terraforming and genetic alteration processess would kill millions before they were completed.
The Eradiator sets up shop in the North Pole, altering the surrounding area into a Kryptonian cidadel. Clark and J'onn rush to stop it, and end up battling the Eradicator. They save the day, and Clark locks the doors of The Eradicator's fortress, saying that he doesn't know enough about the world to help protect it yet. J'onn promises to look after the fortress for him until he is ready.
Season four:
After graduating from high school, Clark decides to travel the world and learn more about it. This would be the most action filled season, and would be very much like Superman, but with a rotating setting and no costume. Clark would fight a good few metahuman threats, amny of them being old JSA villain such as Vandal Savage, Per Degaton, or The Wizard. At one point, he meets a young college student named Bruce Wayne studying under French private detective and bounty hunter Henri Ducard. He also reconfronts the DEO and makes a deal of sorts with them. As long as they leave him alone, he'll help them with major threats to national security when they need him.
The Season finale would have Clark coming home to Smallville. After a few close calls with the press, he wants to have a way to make sure that no one will link Clark Kent to this mysterious flying man saving everybody. So, he and his parents come up with the secret identity. The finale ends with Clark entering the Fortress and exiting in the familiar costume.
If the series continued, it would go on into a Superman series.
If I recall correctly, in Season 2 he had two women live with him. He was married to both, actually. 
