Hopefully this thread is open to amateurs/hobbyists as well.
I voted "Street - people, architecture, life, travel" since I think this covers the largest portion of what I shoot (mainly architecture and travel, though some of the "travel" would be more landscape-like photos). A close number 2 for me these days would be "Private Events", i.e. family.
I never used a motordrive with my FG (did Nikon even make motordrives for the FG?) and only sometimes with my F3, so the "slow" frame rate of the D800 is not a problem for me. (And I guess in those days, the "buffer" would have been the mailer we used to send our film off to get processed.)