I also used to have a ton of Transformers, I even had 2 of the big ones. (Omega Supreme and Metroplex... booyah!)
Yeah . . . Omega Supreme was the tank, rocket ship, train thing that turned into one giant robot right? I had that one, and Metroplex. Except Metroplex had a frickin' wasp waist and split right in half. I had to epoxy him back together. I always wanted to get Trypticon, who was the Decepticon arch rival to Metroplex . . . he turned into a dinosaur or a city.
Hmm . . . I think I had all (5?) of the Dinobots . . . not very many of the old classic ones, I think I had the Lamborghini, and the one that was the same body style as Prowl but a different color. I had a lot of the newer ones. The powermasters came with this little biddy guys that turned into engines, and you had to plug the engines in to unlock them so you could change them around.
There was one I always wanted, but I think it was like a hunded bucks . . . it was something like three feet tall, and the head came off, and turned into a robot that was the normal size of the other Transformers, and then it's head came off . . . Fortress something? I can't remember.