I used to watch X-Files with my parents; they loved that show lol.
I was listening to a radio show awhile ago and the host said something along the lines that Lost's creaters didn't intend for the show to have this many seasons. ABC stepped in and changed that. Interesting
The first season is very briskly paced. It moves fast, it sets lots of things up, it introduces lots of characters with SECRETS. It also ends on an incredibly eventful set of episodes, and to date, nearly two full seasons later, there has been very little definite resolution to the things set up at the end of the first season. They have dragged things out, piled mysteries on mysteries to further the obfuscation, introduced new, uninteresting characters. . .it's like heroin. You get hooked and it's all downhill from there.
I can honestly say the first season is very entertaining TV, but in hindsight, it's not worth it knowing what happens afterwards. Avoid like the plague. There's nothing as awful as an unsatisfactory resolution.
EDIT: The writing also relies a lot on contrivances and convenient coincidences. It was kind of forgivable in season one because, well, it was the first show to do it, and there still appeared to be reason to the madness. We know better now.