Originally posted by LikeASong:[..]The riffs are easier to start with, but with the time, you will slowly and slightly forget individual riffs (I hope not, but... it will happen). On the other hand, a chord, with its single sound and structure, can barely be forgotten, it remains many longer.
You must think that, in all U2's discography, there are about (or more than) 100 different and recognisable riffs (not talking about small licks, solos, etc), but... how many chords there are? Not more than 20 or 25. And moreover, the individual U2 riffs will be useless if you want to play other artist's music (how many songs do you know to feature WTSHNN's or Gone's riff?)... On the other hand, a chord is universal; the same Am chord is present on Staring At The Sun by U2, or Stairway To Heaven by Led Zeppelin, or She Loves You by The Beatles, or Time Is Running Out by Muse......
This all is my opinion, because I also started playing riffs (first ones were Miracle Drug and Still Haven't Found), but now I only look for chord structures, riffs come easier when you know the chords of a song
I second this. Once you learn chords, everything becomes easier including riffs, scales, licks, solo's, and even just jamming with friends. Once you learn scales, if your friends are playing a song you don't know, once you become familiar enough with key signatures, scales, and chords, you can just say "tell me the first chord", and you can just solo and use licks based off that one chord, and it will ALWAYS sound good with whatever other chords they use. Learn chords first. I'm not saying, learn like Dsus7 and all of those obscure chords, or jazz chords and scales, but learn the basic ones, u2 pretty much only uses basic ones, E, A, D(most of their songs are in the key of D), B, F, C, G, and all that jazz.