Bob, sounds like cellulose (the good stuff). Blown is best since it fits more tightly in all the cracks and crevices. Cellulose is best when tightly packed because it then forms an air seal.
You don't want a vapor barrier, but you do want to air seal. Caulk, foam, or bag any penetrations, eg. balloond framming bays, plumbing and electrical entrances, around chimneys, light fixtures (be careful of recessed fixtures thought), and look carfully at things like dropped ceiling framing. No amount of insulation will help as long as air can pass through your ceiling/attic boundry.