When Slizer/Roborider came out, I was not intelligent enough to understand it because I was 2 years old. Also, I had never heard of it. But when we stopped by a friend of my dad's house one time, I got to play with Bionicle. And after that, my dad knew that he was doomed to buy them for me. (Until I actually got money, that is.)
I saw small picture of Roborider in some little Lego catalog-thing, but I have lost it. I do have several of the parts, and I will be getting an almost-complete Roborider in one of my shipments; the Swamp Roborider. I have many of the wheels as well. I also have some of the disks from Slizer.
I have many sets from Alpha Team, but I only got into it during the underwater sets. I found the Alpha Team submarine in the road on Christmas day, and my dad said that it must have fallen out of Santa's sleigh. (hmph) One of the clicking-axle pieces was slightly broken, but it was still useable. I got many more during the ice sets.
Never got any Rock Raiders sets, but I do like some of the parts they have.