We've all been there. We think we know what we want, maybe we've been wanting it for years, but when we finally get our hands on it we wind up disappointed. It's never a fun experience, but it often sticks with us and leaves us with an important life lesson we can share with others.
That's sort of the point of this list. When someone asked others to share the thing they really wanted but regretted after, we gathered up some of their responses and brought them here! Heed their warnings!