The Kill Bill Series was excelent.
From Dusk till Dawn is one of the few decent vampire flics out there.
Sin City was really good if you can get over the gore, language and partial nudity.
Rodriguez got his start with El Mariachi, a super violent low budget film, then he did From Dusk till Dawn.
Some how he was the director for Spy Kids and the Adventures of Shark Boy and Lava Girl. I have seen pieces of both of those movies (because I couldn't watch the whole thing). They might be good for kids but I wasn't entertained (as opposed to The Incredibles which was fun for all ages). I think the best thing to come out of those films is that Shark Boy was a test vehicle for the special effects that he used so well in Sin City.