Mush, i'd say it depends on the bands you are trying to play along to.
I mean, I started off learning Guns N Roses to death and that was good fun because Slash and Izzy had some pretty inventive stuff. Overall i've learned bits and bobs from lots of bands. I'll give you a list of songs I can play (Been playing just over a year so far) so you should be able to play some of this stuff methinks already then theres maybe a few not your usual style you might want to give a shot.
Guns n Roses - Sweet Child O' Mine, Welcome to the Jungle, Back Off Bitch, whole lotta rosie, November Rain, Rocket Queen, Paradise City, Out ta get me, My michelle, Anything Goes
ACDC - Back in Black, Highway to Hell, Dirty Deeds
Audioslave - Cochise
Ozzy/Sabbath - Crazy Train, Paranoid
Bon Jovi - Living on a prayer, Its my life
Breaking Point - One of a kind
Bullet for my Valentine - Hit the Floor, Cries in Vain
Deep Purple - Smoke on the Water
Foo Fighters - DOA, Resolve, One by one, Learn to fly, Best of You
Funeral for a friend - Streetcar, Into Oblivion
Iron Maiden - 2 minutes to midnight, The Trooper, Run to the Hills
Jimi Hendrix - Voodoo Chile, Purple Haze
Lit - my own worst enemy
Megadeth - Crush Em
Metallica - Enter Sandman, Seek and Destroy, Sad but True, Whiskey in the Jar, I Disappear
Muse - Knights of Cydonia, Stockholme Syndrome, New Born, Time is running out, Hysteria, Plug in Baby
Nirvana - Smells like Teen Spirit, Come as you are
Papa Roach - Between angels and insects, Dead Cell, Last Resort, Blood Brothers
Santana - Smooth
Stereophonics - Dakota, Bartender and the Thief
Van Halen - You Really Got Me, Eruption
Velvet Revolver - Slither
Wolfmother - Joker and the Thief
Trivium - Dying in your Arms, Crusade, Anthem (We are the fire)
Offspring - Pretty Fly (for a white guy), Walla Walla, Million Miles Away, Want you bad
Ataris - Boys of Summer
Steve Vai - Halo Theme tune (Yes I am a geek!)
Queen - Bohemian Rhapsody
Paul Gilbert - Scarified
Linkin Park - Bleed it out
Danzig - Mother
Avenged Sevenfold - Almost Easy, Scream, Critical Acclaim, Bat Country, Beast and the Harlot, Afterlife, A Little Piece of Heaven
A-Team Theme Tune
There you go, theres a few suggestions from the sheets of tabs I have in my folder. Theres others I know too that mates have taught me but i'm sure those above are more than enough to keep you occupied