Go-Bots were cool when I was a kid, but only in their own niche sort of way. That Rock Lord shit tanked them though completely.
I remember getting 2-3 Rock Lords back in the day....while it was fun to throw them around, roll them on the ground...all the rocks looked the same (just different colors/finishes). It definitely was a step down from the "robot + vehicle" concept. Even M.A.S.K. offered more fun (vehicle + weapon).
Also: Gobots (vehicle + goofball).