I’m on Team C-3PO.
I won’t go so far as to say R2-D2 is overrated just that C-3PO is underrated.
C-3PO is “fluent in over six million forms of communication,” the most important one being English with robot being a close second. Without Threepio we’d wouldn’t know what Artoo was saying but he’s more than just the voice of this robotic comedy duo.
C-3PO plays a crucial role in ever episode of the original trilogy:
Episode IV: A New Hope
When the Jawa merchants bring out C-3PO and R2-D2, Owen Lars passes by Artoo and specifically says “not that one.” He opts for the R5-D4 instead. It breaks down but that doesn’t necessarily mean Artoo was his next choice. There was also an R1 unit for sale. R2-D2 is selected only after C-3PO personally vouches him. If not for C-3PO, Luke would have never gotten Princess Leia’s message for Obi-Wan.
Episode V: The Empire Strikes Back (deleted scene)
Han and Leia manage to safely escape the rebel base on Hoth after C-3PO removes a sign warning about a trapped Wampa. The pursuing snowtroopers stop and investigate to the unmarked room with dire consequences for one of them.
Episode VI: Return of the Jedi
The Empire wouldn’t have been overthrown without the help of the Ewoks, who only become allies with the rebels because they believe C-3PO to be a golden god. Don’t forget, the Ewoks nearly ate Luke, Han and Chewbacca!
Are you on Team C-3PO or Team R2-D2?