I actually love all of it, minus a couple characters (but the characters are still well developed), and bits of animation, but the score REALLY ties it all together for me.

I love all of it =)
But if i had to choose it has to be the Charaters

It's the only one Disney's movie I love all about! All! It's perfect as it is!

The Score- Perfect score in this movie. Easily the best Princess Movie score in my opinion.

Plot- I like this plot a lot.

Characters- Like with Aladdin, this has a good prince, princess, sidekicks, and villain.

Animation- Very good. In my top three relatively modern Disney movies for animation (this, The Lion King, and The Hunchback).

Happy ending- Good...

Voice acting- I love all the voices in this movie!

Songs- Extremely good songs across the board.

Romance- The most romantic Disney Princess couple in my opinion.

and the plot

I really like how the Beast and Belle actually have a story behind their love other than "I heard her sing and instantly fell in love with her". I think Belle was the first princess to have that happen, right?

I wish there was an everything option....

Even though it's flawed. I went through all of these and rather than thinking of what I loved about each, I thought about why I houldn't choose it.
Score: I'm just not a big fan of it at all.
Characters: Gaston, Lumiere and Cogsworth are the only outstanding characters. The Beast is good at the beginning, but he just deteriorates in an absolutely sickening manner.
Songs: Be Our Guest and Gaston are the only two songs I actually like. I absolutely adore both of them and simply have to sing along. The rest... Eh, not so much.
Animation: Oh Jesus Christ, the animation of Belle is unbearable to watch. Not only is she horribly inconsistence, but there are moments where her movements are very iffy, particularly in the scene with her father after "Belle".
Romance: The Beast just becomes an unbearable character when he falls in love with Belle. I love his angry temper and snappy tone we see at the start of the film. When he gets all kind and refined... Ew. Good Lord, no.
Happy ending: The whole "I LARVE YOU!" and the petal falling and the bodged firework display is so cheesy that it's tacky beyond belief. Since when did the Enchantress make it so that if he is loved, he also becomes immortal? Pfft.
Voice acting: Really don't like Paige O'Hara's voice. That is reason enough not to pick this.
Plot: Like I said, it's flawed. But it's not a bad story. It's certainly not boring like certain films I could mention (*cough* Sleeping Beauty *cough*).

The score at the very beginning of the film gives me tingles. Love it.

@Straggy- as usual, you gave your rundown for BATB, but fail to give it to other disney movies. We got it. You hate BATB.

I agree with princesslullaby. You don't have to say it everytime Straggy.