I'm going to leave the TV series out of this for now. Not due to any ill will; if I include it, I want to scrutinize it in its entirety, and I just don't have the focus to process that much information at the moment

1.) Most liked Land Before Time character -
Ah, it's far too difficult to choose a favorite! Each character adds their own unique flare to the series, I really like them all for one reason or another. Soooo I guess I'll just list a few of those reasons:
Littlefoot, for his courage, objectivity and heart.
Cera, for her spunk and grudging benevolence (it's very hard to find strong female characters that don't irritate me, so Cera gets an extra gold star

).
Ducky, for her innocence and optimism.
Petrie, for his gullibility and general wackiness.
Spike, for his steadfastness and loalty.
Shorty, for his complexity and unexplored potential.
Mo, for his indomitable spirit

I could keep going, but that's probably enough

2.) Least liked Land Before Time character -
Hm, there aren't really any characters I specifically dislike... I guess I'll have to go with Loofah and Doofah, just because they're the least interesting.
3.) Most liked Land Before Time song -
If We Hold On Together. I'd start singing this to myself in combat training when I felt like I couldn't run any farther. Fortunately I was too exhausted to feel self-conscious about it

That extra little push a person needs can come from the smallest things.

No One Has To Be Alone deserves a spot here, too. This song pretty much exemplifies my state of mind, along with the accompanying Grandpa quote, "In a world so full of life, you are only as alone as you choose to be." That concept is quite important to me, and I'm thrilled that they touched on it in LBT.
4.) Least liked Land Before Time song -
Probably 'Say So' from XIII. It was the only song that I feel completely fell flat in
all areas.
5.) Most liked Land Before Time film -
Well, the first one is always going to occupy its special pinnacle, but other than that I really loved IX and VIII. XII wasn't bad, either. Guidooooo

6.) Least liked Land Before Time film -
XIII, though I don't hate it. I didn't like XI when I first saw it, but it's grown on me since then.
7.) Most memorable Land Before Time moment -
I think I've already talked about this scene in the 'saddest lbt moments' thread or somesuch, but I really can't help bringing it up again.
It's the scene in the first film where Littlefoot sees his shadow and mistakes it for his mother. It's an unbelievably sensitive scene that makes the pain of her death very real. Quite a striking emotional transformation moment.