Ah, memories of my teens. Dragonlance, of all settings, has a place in my heart. To this day I have never bought anything Forgotten Realms related.
Man, I do love the Forgotten Realms. That universe has this "dark grit" to it, that appeals to me. Of course, I'm fond of Greyhawk and Blackmoor (even Mystara), too.
As for Dragonlance, the appeal of that universe has diminished for me over the years, but I the original Dragonlance mega-campaign still holds a special place in my thoughts.
DL 1 is, even to this day, a fanstastic adventure. It's a big sandbox, really, side-by-side with a huge plot. DL 1 doesn't suffer from the railroading normally associated with the rest of the DL modules. Sure, the whole point of the adventure is for the heroes to get to Xak Tsaroth and start the story that will lead to the mega-campaign. But getting there, really, is completely up to the players. They can go straight there, or they can spend weeks--months even--exploring the country-side and mountain ranges.
If the PCs go straight for the swamp, then they will miss out on a huge part of the adventure.
Some of the highest praise I can give to DL 1 is its re-play-ability. I've DMed it no less than four times over the years (probably a few times more that I'm not counting), and each go-through was a different experience.
There's plenty of "hooks" included in the adventure, too (like any good sandbox) that just beg the DM for further development. The last time I ran DL 1 (a few years ago), we put a lot more detail on the Seekers and the various Plains Barbarian Tribes than is in the adventure--stuff that could probably fill it's own supplement. And, that's just scratching the surface--there's plenty more on the DL 1 map that begs for further development.
At one time, I wanted to run an entire campaign just based on the one adventure. I wanted it to be a "prequel" to DL 1, starting the PCs out at Level 1 and watching them grow into the higher levels that the PCs are when DL 1 begins (I think it's a 4-6 level module, or there abouts). I never got around to that, but it's still an intriguing idea.
It's really a fanstastically written adventure, and although I like the rest of the Dragonlance mega-campaign, none of the other original DL adventures are a great as DL 1.
I put it up there with those "special" adventures like
Keep on the Borderlands,
The Secret of Bone Hill, and the
Sinister Secret of Salt Marsh.
It's just plain, good fun.