On asking for favors

Some people have no problem asking for favors. Usually, I wouldn't have a problem with this, as long as they appreciate the favors that are done for them (and periodically show their appreciation), and/or occasionally return the favor. Sadly, life isn't that simple and people can really take advantage. The hard part is that some people are so kind and so giving that they don't realize how far out of their way they're going to help someone who doesn't really appreciate them as they should.