I'm with kimck. With kids spanning 6-13, the 6 year old ends up watching programs that may have been inappropriate for the 1st or 2nd kid at the same age, primarily so that we can all watch as a family. We try to avoid graphic violence, sex, and profanity. PG-13 or lower for DS9 & DS6. DS-12 & 13 are allowed to watch some R if we're there and assuming it's not just gratuitous sex or violence.

Kimck, if you like DVD sets for TV programs without commercials, I'll tell you our favorites over time (not necessarily in order):

LOST
Heroes (we Love this, though it's a little scary/suspense)
Veronica Mars
The Unit (boys & weapons)
Intelligence (the kids were not as mesmerized, but it's excellent)
Firefly (kids Loved this and the movie Serenity)

It makes us sound like we're TV addicts, but we really just watch one program a night and they're shorter than movies (usually about 45 minutes). The continuity is great (we don't have to wait a week to find out what happens--just the next night).