songs that you learned that made you a better guitarist

Learning the phsycosocial solo made me a better guitarist.

the intro solo from silent screamer by tatsuro yamashita 

it was a nightmare learn it but it really helped to my technique

I learned a part of "Revolution Is My Name", I think it helped me specially for the speed that you need to play it 

I know it sounds super lame, but genuinely Mr. Mustache by Nirvana. The fast alternating riff, plus how fast it went really helped me out. It's that or Holiday by Greenday, it got me more used to fast chord changes

I know it sounds super lame, but genuinely Mr. Mustache by Nirvana. The fast alternating riff, plus how fast it went really helped me out. It's that or Holiday by Greenday, it got me more used to fast chord changes

The chorus to Machine Head's "This Is The End" greatly improved my alt picking and the verse helped me be more precise while being fast because you're moving your left hand all over the place. 
"Crystal Mountain" by Death has some cool mid tempo scale runs at the end that helped me have better coordination with my hands.
"Roots" by Sepultura made me realize that not everything in metal has to be complex to be heavy. Maybe all you need is just two notes to be heavy.
The song "...And Justice For All" by Metallica helped my endurance while playing guitar since its almost 10 minutes long!

all nereids beware by chiodos was like one song that made me a slight bit better

a couple of years ago i learned how to play cherry wine by hozier and not only was it great because i finally learned hammer-ons and pull-offs, but it also really sparked my love of fingerpicking despite being previously averse to trying that style of playing