I like Greyhawk, Forgotten Realma, Mystarrq, and Wxandria...largely because they are generic fantasy worlds.
Generic tropes are excellent roleplaying hooks for people to work off of, I dislike "one unique things" because they plaher characters are the unique things.
Dragonlance is probably my favorite, and I look back upon it fondly with nostalgia tinted glasses. I understand it is not as unique or interesting as many other things today, but it was such an important fantasy touchstone for me growing up.
There are so many things I DO like about it, but if I could only pick one it would be: Draconians. Everything from how the eggs were used as blackmail to keep the good dragons out of the battle, the ultimate betrayal of that promise, to how the monsters themselves had on-death effects that you genuinely... well, feared isn't the right word, but they were dang memorable.
If I went back to Dragonlance these days it probably would not taste as good as the memory, so I leave it alone. I'm happy with my fond memories.