I would only add this. Most of the Guitar Tricks Instructors, Andres in particular, stress making the lick or the song your own. While commuting to work, I hear groups like Tom Perry, Aerosmith, Van Halen, etc. doing "covers" of great classic songs. I don't need to look at the screen to identify either the song or the group. Aerosmith's cover of "Come Together" is a perfect example.
My version of "Let It Be" will never sound like Caren Armstrong or Anders Mouridsen, let alone The Beatles; however my own guitar playing is enriched because I learned to play it on Guitar Tricks. And my voice is terrible, anyway :)