GUITAR RIFFS USE SCALE PATTERNS
For example, the speed guitar riffs that are played over metal chords need the energy of the heavy chord rhythm to have a solid sound background to play the solo over. Whether the guitar riffs are played with alternate picking or economy picking, one thing is for sure, they will be more inspired with a great rhythm background. A good rock chord progression makes a big difference depending on how it is constructed, along with the overall timing and feel used for the lead backdrop, which will make a big difference on your ability to work out rewarding guitar riffs.
The real secret to develop the ability to play great guitar riffs is to master your guitar fretboard and all of the music theory that goes with it. A professional teaching software program like Guitar Magic Evolution will give you the high quality guitar education you need to do this.