Rock Guitar Chords Are Not Just Power Chords
There are many different guitar fingerings for the various types of guitar power chords. Even though they may sometimes be considered easy chords, there is much to how to play them, and how to make musical application of them in the various styles of music such as the metal guitar style. How you use and view guitar rock chords in a particular arrangement, especially power chords, will affect the approach to the type of lead guitar soloing path that you will take.
For example, aside from guitar rock chords, by using guitar rock arpeggios and chromatic fill in notes, with good guitar dynamics and speed picking, can give you some great rock guitar riffs. Try combining the guitar rock chords, with arpeggios and chromatic runs along with some great processor effects and you will have some awesome rock compositions.

