I had a ton of G1 toys as a kid/teenager & got rid of all of them
I was in my 20's when Beast Wars was out and I loved that show. (Anyone who speaks poorly of it *will* get choked out).
I really got into the Transmetals line. I got all of them, excluding the Target-exclusive color variants. I packed them away when I last moved, and they're still sitting in a box to this day.
I really liked the Altenators/Binaltech line, and got a handful of those, but the Japanese versions were easily superior. Die-cast metal FTW. The only Japanese one I got is the one I really wanted the most: Smokescreen, the 2004 Subaru Impreza WRC.
I often drool over the Masterpiece line, but they're so damn expensive, especially the bigger ones like Soundwave. I've got Bluestreak & Sideswipe, but that's it. I'd love to get my hands on MP Soundwave and/or Optimus Primal, but I don't have that kind of coin.
Not really into the rest of the current stuff.