The American was pretty good I thought, and another kind of love story too. It sure wasn't anything like District 9, it was relatively slow, which works in some movies, it adds to the more memorable parts. The better of the Blair Witch type movies is called Quarantine with Jennifer Carpenter (from Dexter) you follow a TV news reporter and a cameraman who are doing a story on a local fire company who goes to an apartment building to handle a 911 call - gets interesting quickly.
I watched Hatchet and Hatchet 2 - interestingly, the second part takes off at the end of the first movie when the remaining survivor of a swamp killer goes back the very next day with a large group of people to seek revenge and kill the creature.
None of the films of such genre match Pumpkinhead with Lance Hendrickson (of Millenium - a cool TV series years ago on fox) Pumpkinhead tells the story of a man seeking revenge for the death of his son, using an old witch to conjure the creature Pumpkinhead. The witch is STILL the best I have ever seen in any movie.