Hey, I admit that I still play with Transformers. Every time my son gets a new one, I give him a few minutes to play with it, then I ask for it to see if I can figure out how to change it back to vehicle mode without the instructions. It is kind of like a 3D puzzle.
Last Christmas, he got this gigantic, all metal original Optimus Prime. When in robot mode, it stands 18".
Speaking of '80s toys, we found my wife's Voltron lions and castle in her dad's attic. My son thought they were pretty cool also.