Taste and POV vary, but I would say that, yes, Smallville is definitely worth watching, especially if you have a sense of humor. Start with Season 1 Episode 1, the Pilot. Season 1 and 2 have a strong X-Files influence, with episodes alternating between kryptonite-altered "freaks-o-the-week" and the teenage Clark Kent dealing with his emerging super powers and glimpses of his ultimate destiny.
Some of the special effects on the show have yet to be surpassed, such as the one where we follow Clark super-speeding through a rainstorm and the rain drops appear to be hovering in mid-air. Please ignore the annoying little toddler in this episode.
In Season 4 Lois Lane looking for her cousin Chloe only to discover a naked amnesiac Clark Kent lying in a field. Clark later reboots in full Kal-El mode and takes off into the sky for a full flying sequence. Season 4 involves Clark's need to collect 4 "stones" (Kryptonian technology) that he must later assemble to build his icy Fortress of Solitude at the beginning of Season 5, an episode that should not be missed.
Season 6 introduces the Green Arrow, a Robin Hood type of hero with Batman-level gadgetry. Naturally, he and Clark hit it off right away.
Season 7 also had its charms. It introduced Lark's Kryptonian cousin Kara (Supergirl). She had her charms although her story was less than remarkable. What made season 7 for me was the Traveler/Veritas arc toward the end: a Da Vinci Code-like story about a secret society of billionaires who are making the world ready for an alien they refer to as The Traveler (Clark), who they believe will be the world's next savior. Fans of Dan Brown novels would appreciate this one.
My feeling early on was that if Smallville could survive beyond its early teen-angst phase, it had the chance to evolve into something really remarkable if it could tell the whole story. And it did, eventually. In Seasons 8 through 10, Clark joins Lois Lane at the Daily Planet, where he learns the dual professions of reporter and public superhero.
Another thing that makes Smallville special is the way the Clark-Lois relationship evolves, starting with a sort of snarky sibling rivalry in the early days, moving towards a professonal friendship and eventually a romance that was lots of fun because it had none of the twisted angst that defined the Clark-Lana romance. Another unique idea was having Lois Lane be personally involved in engineering and protecting Clark's future public superhero identity. It was much deeper than simply naming him "Superman" which she doesn't actually do in this series.
So, yeah, Smallville is worth watching all the way through.
I used to watch a few episodes here and there in the really early days, but kinda got bored of it and just stopped. I also had this little phase where I just hated Superman (still not a big fan honestly). Lol, When the series finale came up though I felt like I should've kept watching it, and I even resisted watching the series finale just in case I wanted to watch the build up first at some point.
All of you know the show is done with, so is it worth watching it now? I mean what if I like it, then I'll just cause myself to want more and know that I can't have it! Lol
Also, if I should start watching it, where should I start? I've seen most of the first few seasons, and I don't think I really want to start off at the beginning, but would that be the best move?