Wrong again, son.

Modes are the basis of the many different styles of music that we have today. Pop is basically major and minor. If you want a jazzy sound, use dorian. If you want a darker sound, use locrian, phrygian, or harmonic minor. Celtic or blues, try mixolydian.

What you have to understand is that the chord progression that you're playing over has to be in the key of whatever mode you're using. Playing G mixolydian over a G major progression would sound like crap. But G mixolydian over a G mixolydian progression would sound celtic and airy.