I like John's attitude that he enjoys different types of ponds. I would think satisfaction would be more easily obtained if a person enjoyed what the pond evolved into rather than some of us have certain expectations and a picture in our head and are disappointed when that picture perfect pond doesn't quickly appear.
The Tilipia sound intriguing to me. The nice thing about them, at least for northern latitudes, if you screw something up at least they go away and do not hang around to become an everlasting problem.
