Can't really buts out a top 3,

But best toy
STAR CONVOY!

Best Cartoon, tricky one, as I really enjoyed MasterForce and Victory quite a bit.
Victory wins due to the kick ass fight between Dezasarus and Star Sabre at the end.

COmic book?
Um, I like the compilation of comics that I picked up that is from some TV magazine apparently. Mainly because they actually provide some story for the Return of Convoy series. And a rather creepy looking Megatron!