By a quick count, the following positions led by more than 50% over the next most popular alternative: 

a priori knowledge,
analytic-synthetic distinction affirmed*,
epistemic externalism,
non-sceptical realism*,
empiricism*,
compatibilism,
atheism,
non-Humean laws of nature*,
classical logic*, 
externalist mental content,
moral realism*,
naturalism,
physicalism,
moral cognitivism*,
perceptual representationalism (assuming 'other' is not just one position)*,
psychological view of personal identity (ditto)*,
egalitarianism (ditto)*,
scientific realism*,
switch trolley line*,
correspondence theory of truth*.

The positions marked * correspond with what I would take to be the "common-sense" or pre-reflective view -- that's 13/20 of the above.  (Maybe another survey is needed to confirm my impression of what common-sense is.)  Four more positions (compatibilism, atheism, naturalism, physicalism) express the zeitgeist -- they are not "common-sense", but they fit into a broadly scientific world-view. 

That leaves, as positions in which philosophers are likely to differ from lay-people (at least those who have a broadly scientific world-view): a priori knowledge, epistemic externalism, and externalist mental content.  Is this evidence that Gettier and Kripke-Putnam are the most influential philosophers of the second half of the 20th century?