In his review of Transformers: War for Cybertron, Dan Stapleton referred to "the tingly nerd-joy of hearing original Optimus Prime voice actor Peter Cullen's authoritative dialogue". Every time the character appeared on screen, as he did many times in videogames like Transformers: Devastation and Fall of Cybertron or the middling movies, it was thrilling to hear him and realize, yes, they got the "real" Optimus Prime.
As noted by The Hollywood Reporter, Cullen has died at the age of 85. He joins a string of particularly beloved celebrities to have died in recent days, including Dolly Parton, Yayoi Kusama, and Red Alert 3 star and camp icon Tim Curry.
