8. Firefly
Composer: Joss Whedon
Artist: Sonny Rhodes
Did you know Whedon wrote the theme song? If not, now you do. DeathByTroggles: The More You Know.
At first the theme song seems inappropriate for a sci-fi show as “The Ballad of Serenity” is country-western. But then you watch the show, and yup, it fits right in.
7. Big Bang Theory
Composer: Barenaked Ladies
Artist: Barenaked Ladies
There’s a pretty regular joke that this show has been #1 for years and nobody knows anybody who admits to watching it. Well, I’ve seen quite a bit of it (in syndication, while doing other stuff). It’s pretty terrible. The first few episodes showed some promise, but it quickly devolved into the same bad jokes and catchphrases week in and week out.
What is still awesome if the theme song. And here’s an example of the extended version being even awesomer. I’m a huge Barenaked Ladies fan, and this song is very professionally done.
Death By Troggles 
Love the Firefly theme! It’s one of the few TV theme songs that has found a permanent home on my MP3 player.
I kind of wish it was longer, but lord knows that isn’t always a good thing.
God I love the music from Firefly. It was beautiful
I have the Firefly soundtrack, and it is glorious. Probably number one for me.
yeah, it’s not just the opening theme. Probably #1 for me too for “music from a series”
That Firefly theme and soundtrack was awesome.
Yeah, Big Bang Theory is awful. It’s terribly predictable, even for a sitcom. I hadn’t ever caught the theme before this. It’s not too bad.