M.A.S.K. -- I remember thinking that the cartoon was average... but the toys were neat (everything that transormed was hot then: Gobots, Transformers, Voltron, M.A.S.K., and later ROCKLORDS!).
I actually had a M.A.S.K. comic book or two and I really liked them. Always wanted to get more of them.
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Here are two that will stump most of you: Does anyone remember Spiral Zone? It was a pretty crappy cartoon that promoted a pretty kool toy line of the same name. The most iconographic image from Spiral Zone is a huge motorbike with one, huge "wheel": the rider sat inside the wheel (where the hub would be). That's just the koolest.
Another short-lived toy line that I really dug was called... "Legions of Power" (or something like that)... it was a concept similar to ROBOTIX (someone mentioned this earlier) and LEGO: you get an assortment of plastic cubes, shields, cockpits, guns, etc. and you build spaceships, motorized tanks with rubber tracks, etc.
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STARBLAZERS is one of my favorite cartoons from childhood, along with Battle of the Planets.
Rocklords were lame, by the way.