Holy crap, I can't believe how underated my favorite starter is.
This little guy is amazing, up until Hoenn, I was always disappointed with grass starters, always giving them a shot and always falling short to my friends who had chosen the water and fire starters.
I'm not saying Venusaur and Meganium are bad Pokemon, but they've always seemed more defensive than offensive. I mean I used Meganium so little in G/S/C I ended up relying on my Ampharos most of the time. Meganium had moves like Reflect and Light Screen, pointless moves imo. Venusaur was a lot better than Meganium, though, but it wasn't nearly as offensive as Treecko/Sceptile.
In R/S/G my Sceptile plowed through the whole region, and instead of Razor Leaf or something it had Leaf Blade, one of my favorite moves. It was really a great Pokemon. And when 4th gen rolled around, it had access to Rock Slide! Giving it a little flare (haha) against fire Pokemon.
Its design wasn't over the top either, it's really fitting, as all Hoenn starters are. Sceptile's design especially is very sleek.
Sceptile is my favorite starter, hands down.