power chords are awesome to learn if you're into hard rock. pretty much every metallica song and well metal song in general has powerchords in it, so once you've learn them, picking up tabs for hard rock will be a lot easier. Powerchords aren't as melodic (is that the right term) as normal chords because they don't use 5-6 strings to produce the chord but if u want that rock sound, you've got it.