Songs which work for particular technique practices and you have the CHOICE of are by artists like:
•Nirvana
•Snow Patrol
•Muse
•The Beatles
•Oasis
•The View
•Green Day
•Smashing Pumpkins
•Rage ATM
•System Of A Down
•Marilyn Manson
•The Fratellis
•White Stripes
•Radiohead
•Chili Peppers
•Hendrix
•AND IT DOES NOT STOP THERE!
Other peoples music is used to put the techniques into practice and impress ears but once you have a song cracked don't stop there as too much concentration can go on recreating the original... Hack it! Take the chords/riffs and warp them with different character, e.g. my dark grunge version of 'Come Together' by The Beatles, and swinging Jazz Lounge version of 'Polly' by Nirvana.
There is no practice quite like taking the ingredients from top songs and brewing your own free fusion.