If I watch only the mythology episodes, will I be missing any pertinent information? I've tried watching the entire series on several occasions, but after season 3 it gets very boring to me and I always drift away.
) Kind of funny that you would tell a bunch of x-philes that you were bored with the show.
If you watch only mytharcs, you'll get the gist of it. But the benefits of watching all the MOWs is that you get character development of some of the key players in the mytharcs. So, not essential to watch the whole series, but, IMO, you'll only be getting about 80% of Carter's intention.
Regarding your boredom, Season 5, the movie, and Season 6 are the antidote to anyone's boredom.
I agree, I have done a rewatch and I decided to watch 15 episodes from every season, so I missed 5-7 episodes each season. As I didn't want to miss character development and some MOWs had moved the story in some eps.