Ok so my 'Describe the Live Act in One Word' thread gave me the idea to do it for all the LP albums... I think it's interesting how much one word can convey what people think about something. Anyways, my word for HT is: classic. What's yours?
Foundation. Let's be honest, no matter your feelings about the album today, Linkin Park is still relevant because of this 15 year old album. Ask any casual fan (someone who doesn't like the band enough to create a username on an LP-specific fan site), and this will be the first album they can name. Everything the guys have done starts with Hybrid Theory.