Re: Favorite modulation type
Chorus easily. It can really liven up cleans to make give them a full and "epic", "serious" or "reflective" sound. It has been the basis for many of the softer passages in metal and heavy rock music for the past 20 years or so. Flange and Phaser arn't nearly as useable, IMO.
Metallica, Anthrax, Megadeth, Meshuggah, Guns 'n Roses, Suicidal Tendencies, Nirvana, Pantera, Dream Theater etc. etc. etc.