Okay, I know I'm a total dork, but I really enjoyed this movie. This alien-comedy by Nick Frost and Simon Pegg (the blokes who brought you Shawn of the Dead and Hot Fuzz) was self-aware, self-referential, and packed full of geeky goodness. References to Star Wars, E.T., Close Encounters of the Third Kind, The X-Files,and Star Trek (and I'm sure many others that I missed) were plentiful and fun to spot, and believe it or not, they didn't feel trite. In fact, the writing was clever, simultaneously making fun of and paying homage to the genre stereotypes. The overall plot was simple, but it allowed for hilarious and endearing character development and interaction.
Although my geek goggles might be skewing my vision, I laughed heartily and obnoxiously throughout the film, and I give it a heartfelt recommendation.