This one's easy unlike the other poll. Grimlock.

Like Goktimus and others I got Snarl first and Stegosaurus are cool, but then some months later I got Grimlock who even before reading the comics impressed me even more, not just because he was a T-rex but because his robot mode was also so cool looking, and even the art on his box which I can still remember was one of my favourites. Actually I don't even recall getting Snarl anymore, but I know I got him first.

Snarl is always my second favourite Dinobot.

Speaking of Snarl and Grimlock it's kinda funny that the Dinobots are actually made up of dinosaur species that existed millions of years apart from each other, it's more aproblem for the comic continuty though as the Ark must have spent a long time scanning dino modes for them.