Tips on Picking Audio for a Dialogue Animation
Here is just a few tips I have picked up over the years to find better audio clips for dialogue animation work for reel . Hope this helps.

Things to look for in audio1.keep it to one person for the first few
2.has a clear change in attitude in the clip to give more thought process to your character
3.no laugh track , music or noise in the background
4.pick it from a movie you have never been to
5.no profanity why limit where you can show it.
6.Don't use a movie alot of people have seen that know the actor like the godfather for example.
7.Look for contrast in the dialogue not all screaming so the character has somewhere to go with the performance
8.Make sure their are moments where their is no dialogue to give time in your animation for your character to think. Animating in the pauses is the juciest bits! YAY!
9.Look for audio clips, which have a few seconds of silence in it are great, because during that time you are not "stuck" with the dialogue/monologue, you can do your own thing.
10. Make sure the clip does not cut off short or fade away. This is super distracting on a reel.
11.Don't use any clip that has exposition in it. That means a character explaining something, like an evil plan or something like that. It's like reading a manual, there's not a lot of thinking involved, or conflict, or contrast
12.Pick a clip in english so you and your viewer can understand it.
13.Don't pick a clip from any already animated.
14. Don't use any famous actors, especially comedians, like Robin Williams, Jim Carrey, etc. If you choose a sound clip that's well known (like anything from "Office Space"), then people will think about that movie and the actors that say the line, not the character that you are animating. They already have an image of how the character should act, based on the real life actor. You don't want your character being compared to the voice actor, you character needs to stand on its own


Great Places for Audio Clips
Moviewavs | http://www.moviewavs.com/
Movieclips | http://www.movieclips.com/
The Daily.wav | http://www.dailywav.com
What's the scuttlebutt | http://www.whatsthescuttlebutt.com/
Moviesoundclips.net | http://www.moviesoundclips.net/movies.php
soundboard | http://www.soundboard.com/category/Movies.aspx
The Movie Sounds Page | http://www.moviesounds.com/
WavCentral.com | http://wavcentral.com/movies.htm
Listen to a Movie | http://www.listentoamovie.com/
Sounddobs | http://www.sounddogs.com