I've started watching x-files at least a dozen times but flame out.
I really dig those early 90's show but i always end up flaming out. I'll get a season or two in, not watch for a long time, forget where i was and really not want to start over but not spend the time trying to figure out where i left off. Star Trek TNG, X-files, Millenium, The Simpsons, Brisco County Jr, Parker Lewis Can't Loose, Saved By the Bell, Beavis and Butthead, are just some of the few i've spaced on.
X-files is probably the only one on that list I've not seen every episode of (there may be a TNG or two) so it's on the top of the queue for sure.