These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
No nominations for Zodiac, though it suffered from an early release date, and from coming out in a year as strong as 2007 (which was also dominated by dark thrillers/character studies like No Country for Old Men and There Will Be Blood).
Magnum Opus: Has several contenders. The Social Network is his most lauded film, in terms of awards (and appeared on more Top 10 lists than any other in 2010), Zodiac was similarly acclaimed by critics, and Fight Club and Se7en both have great resonance in pop culture.
Tough Act to Follow: Fight Club had a mixed critical reaction and did poorly at the box office, but nevertheless had such an impact that it overshadowed much of Fincher's later work. He seems to have finally escaped this as of The Social Network, with its multiple Oscar nominations and very enthusiastic critical reception.