I like mangá mais because it tells you the whole story, and at the end of the dia it's usually the only medium you can rely on to be completely "canon" (unless of course it was a novel series or something similar first). Also when you read instead of watch, you can control the pace at which you enjoy the story.
It varies. It's awesome to see your fave characters off the page and animated, but animê also often have to leave out details or completely alter storylines that make it worse. If I have a mangá I love, I want nothing mais than to see it animated.
