Hmm.. I'm trying to learn songs and riffs most people will recognise.
My list so far:

Whiskey In The Jar
Whole Lotta Love
Smells Like Teen Spirit
Smoke On The Water
Iron Man
Back In Black
I'm a rockstar without the skills, fame, or income.

Washington Redskins
Eric Clapton - Layla
Eric Clapton - Tears In Heaven
Eagles-Hotel California
Jimi Hendrix - Purple Haze
Jimi Hendrix - Fire
Kansas - Dust in the Wind
Guns n Roses - Sweet Child o Mine
Guns n Roses - Welcome to the Jungle
Lynyrd Skynyrd - Sweet Home Alabama
Black Sabbath - Iron Man
Whitesnake - I Just Died in YOur Arms Tonight
I always thought everyone would recognise Plug in Baby's intro riff. But I was proven wrong. Still, it's pretty well known.
And yet, to me, what is this quintessence of dust? Man delights not me: no, nor woman neither... nor women neither.