I just find that people will always try to pin responsibilities on me because they know I feel guilty for not being thoughtful or not helping someone out. For example, my brother may ask me for a lift early in the morning while I'm trying to get a project done. And will say no at first, but he knows the more I ponder about it the worst I will feel and eventually he will get his own way. Same with my parents. They will come in and demand that I do a certain thing. They are perfectly capable of doing it themselves but they have their excuses. Mine is obviously less relevant, and they know that 9 times out of 10 I will cave. I'm getting a bit annoyed that people take advantage of my good naturedly wanting to give people a hand!