Not necessarily your favourite, but a quote you find to be very meaningful or just plain awesome Some are even from Anime ^^
Here are some that I like:
Always listen to the experts.
They'll tell you what can't be done and why. Then do it.
God gives us dreams a size too big so that we can grow in them.
"False tears bring pain to those around you. A false smile brings pain to one self."
"Sometimes people put up walls not to keep people out, but to see who cared enough to tear them down''
"If you're lost, extend your hand; that way you can reach out for something"
-Kantaro Sakai (Shakugan no Shana)