Fight Club obviously was very funny (and very serious at the same time) to me. thats certainly my type of humor.
as for TV shows that i find funny, i've always liked Arrested Development, Its Always Sunny in Philedelphia, Seinfeld, House, Family Guy, Simpsons, South Park (occasionally when they do a satirical episode), Futurama, Daily Show/Colbert Report.
edit- Carlin is a hilarious comedian. also love lewis black and daniel tosh
as for me personally, i have a very dark, cynical sense of humor that can probably be pretty disgusting or offensive at times. i certainly have a very large threshold for disgusting or mean spirited humor directed at me. of course, i'm sure a lot of that is upbringing. in my (usually small) social circles, one-upping and cutting each other down was always the preferred humor.
and on a side note, i absolutely despised napolean dynamite. i really can't understand why anyone thinks its funny.