Through the years, there have been many, generations, all of which you know. All of them varying in quality, and over all value. Which generation of toys has held up the best? Was it G1, because of the metal pieces, and no ball joints? But then they get loose, and become unrepairable. Or is it another series? I think that "Transformers: Energon" did a decent job of non-breaking figures for the most part. Same with "Transformers: Armada"