Seconded that The X Files is required viewing for any ... well, for anybody, really. Personally, I recommend watching seasons 1-5, the first movie, and seasons 6-7 in that order. Even though the season isn't very good and Season 6 wrapped up the mytharc, Requiem is exactly how the show should have ended, and other S7 episodes offer closure for other lingering storylines that Season 6 didn't wrap up.
Season 8 is actually slightly better than Season 7, but it tries to start up a new, not-very-interesting mytharc, and Season 9 is just abysmal, leading to a clip-show series finale that sets up a movie ending we never got (and at this point, we probably won't ever get).
In other, non-X Files news, The Walking Dead is finally living up to its potential! If only Scott Gimple were hired as showrunner when Darabont was first fired, and not after we had to endure two seasons of Glen Mazzarra...