Evolution (of a type)

I used to be a Blue Bombardier and then I was for a short time a Bobcat. Then I was a Redman which evolved into being a Minuteman. Then there was a pause until I became a Beacon and then a Jumbo. This was followed by being a Johnny for a number of years and now I'm a Terrier, which was what I almost was before I became a Bobcat.

Sometimes I have the feeling that I go around in big, long, wide circles.