It was a tough choice between Pulp Fiction and Reservoir Dogs, but I ended up with choosing Pulp Fiction because it is a mile stone in movie making.
If the poll had been better worded/explained I might have chosen Reservoir Dogs.
I also really wanted to vote for Jackie Brown(but this might be because it is, in my opinion, his most underrated movie)
The Kill Bill movies were shiny and good, but I think they lacked what I like about Tarantinos movies, the gritty low budget magic he pulls of with his earlier works(also no Tim Roth)
Actually I found Kill Bill(especially the first) to be more fun when you sit and watch and try to spot all the rape/revenge scenes he borrowed from the 70s japanese pinky films.
And finally Inglorious Basterds. I found it dragging/too long with too little plot development. I was really disappointed with that movie. For me the only memorable tarantinoesque character was Christoph Waltz' evil nazi officer.
Also, Four Rooms should be on that poll.