Matt Albie, Studio 60 on the Sunset Strip
Zuckerberg Commonalities: Is socially awkward; gets yelled at by women a lot; has a ridiculously strong command of the English language; is plagued by an idealized ex-girlfriend.
Key Differences: Matt mocks people for a living; Zuckerberg mocks people for fun.

Toby Ziegler, The West Wing
Zuckerberg Commonalities: Prickly; prone to deadpan technobabble ("We're flying in a Lockheed Eagle series L1011. It came off the line 20 months ago. It carries a Sim-5 Transponder tracking system. Are you telling me I can still flummox this thing with something I bought at Radio Shack?" ("Pilot"); indignant when subjected to inquiries he feels aren't worth his time (see: the episode "Five Votes Down," where insider trading accusations make him go sarcasmcopters); has a ridiculously strong command of the English language; unable to tolerate those he perceives to be intellectual inferiors; gets yelled at by women a lot.
Key Differences: Toby's a much more loyal guy than movie Zuckerberg, and he's definitely got a stronger moral compass, but Toby drives a 1993 Dodge Dart and Mark Zuckerberg's the youngest billionaire in the world. So, they both have something to be proud of.

Jeremy Goodwin, Sports Night
Zuckerberg Commonalities: Is a computer genius; has a ridiculously strong command of the English language; is pretty arrogant about both of those things.
Key Differences: Jeremy knows what sports are. Also, what feelings are. He's like an evolved movie Zuckerberg.

Any more movie Zuckerberg-to-Sorkin-character parallels? Leave them below, then see how the movie could have been more David Fincher-esque.

Does anyone love watching movies more than characters in movies? Check out this mash-up.