I don't own a teardrop yet. I do belong to the teardrop forum and that question has been asked there. Those that pull a teardrop behind a bike love them. They are light enough and like most trailers if it's loaded correctly pull great.
There is one company that I know of that makes teardrops for bikes but they are expensive...around $6,000. On this forum they show you how to make your own teardrop for quite a bit less than that.
It's an interesting read and they will answer any questions you have.