Grimlock is known for talking about himself in the third person and in simple sentences. That's why he's often seen as a 'dumb brute'. But it's a bit more complicated.
The classic Grimlock
In the 1984 cartoon the Dinobots really do think simply — partly because Wheeljack built them with more primitive systems. Grimlock is stubborn, proud and dislikes orders. Yet he repeatedly proves cleverer than others assume, and even leads the Autobots in some episodes.
Other versions
In the comics and modern stories Grimlock can be a strategist or a victim of injuries that affected his speech. The Cybertron games portray him as a warrior who defied orders and became a legend. Age of Extinction makes him wild but loyal.
Why he's loved
Grimlock is strength without guile. He doesn't scheme or pretend; he honestly stands by his own. In a franchise where many heroes are torn between duty and doubt, he's a breath of fresh air: blunt, funny and unexpectedly noble.
