This is nothing but pure rock/metal, they don't stop. Their are no mellow songs on this album. These songs are perfect and you can listen to this album with out skipping a track.
Chris Cornell sets the bar for any future vocalist, with the power of Robert Plant, the range of Freddie Mercury and a stage presence as big as Michael Jackson. He's the complete package. Here are some key vocal moments courtesy of vocal expert Youtube Timi T.
>B4s on Rusty Cage, D5 and F5s on Slaves and Bulldozers, F#5s on holy water, a falsetto A5 on Face Pollution and my personal favorite the scream going from D5 up to G#5 on Jesus Christ Pose. Also there's an amazing scream at the start of New Damage.
Lyrically as well Chris does the bulk of the writing, some of his lyrics are freakin' incredible, Johnny Cash covered Rusty Cage on the strength of it's lyrics, In Outshined Chris invents a phrase which people have been saving for years 'I'm lookin California and feelin' Minnesota' Then theirs the Fiery lyrics of Jesus Christ Pose which contrary to popular belief is not about blaspheming it's about the fake christian ministers who feel they're better than you when they haven't done S***. Drawing Flies (My favorite Soundgarden song) is just amazing, heck I brush my teeth to this song the lyrics are outstanding.
Kim Thayil warped guitar walks a fine line between metal and psychedelic and it sounds damn good, Ben bass is played strapless and badass, catchy dark rhythms on every song. And I haven't even got words to describe how awesome Matt is drumming, he truly is one of the greatest drummers of the last generation.
All in all this is one of the greatest pure rock albums in all it's majesty begging to be listened to again and again, it get outshined by Superunknown, but personally I think this album is just as good or maybe even better, where there are a few more pop influenced songs or soft songs (Black Hole Sun, Fell on Black Days) on Superunknown but on Badmotorfinger the rock never stops and that's why it's just incredible.