I haven't been listening to the Rival Sons long enough to have a favorite song yet. I heard they opened for Deep Purple on a European tour and so checked out the group.
It's like Led Zeppelin with a dash of White Stripes. The sound is classic rock with constant nods to the blues, with many of the songs clocking in near a White Stripish 3 minutes or so. The singer can really wail and demonstrates impressive versatility. The band is excellent, and the guitarist knows how to lay down a riff.
Yeah, you'll probably think of Zeppelin when you listen, but on top of that you'll be going "This is a great song!" "What a riff!" "Man, that guy can really sing!"
Check it out.