4. If you are going to use a specific character, make it CONSISTENT with the character!
This really grinds my gears! *No pun intended* KEY EXAMPLES (And offenders, again this could be another article in and of itself): Soundwave and “Q” (aka WheelJack). Soundwave was a communications officer (somewhat consistent in “ROTF”) but in the third film, he is a loyal servant of Megatron, which was pitch perfect, but they made him a bloodthirsty killer, which wasn’t him at all, not EVEN close. And “Q”, the look didn’t bother me, I am all for liberties with characters, but as the Autobot Inventor, it’s WheelJack! If you are going to use a character’s personality, likeness is flexible, but at least call the character by his damn NAME! Now when it comes to the robots, change colors, hell change forms (as long as it’s consistent with the original i.e. Sideswipe), but make him somewhat recognizable to us fans, PLEASE!