I think every instrument has its own difficulties and easiness. I'd assume (not being a drummer, myself) that it takes a ton of hand-eye coordination. I'm pretty sure you'd need a great sense of rhythm and you'd have to be perfectly on the beat without mistake. I don't think it's fair to imply that there is an easier instrument to play, because every instrument has its own charm. A person can be bad at drumming, but great at playing the trumpet. A person can have a wicked improvised drum performance but fail at a guitar solo. Also, the notion of a "real" instrument is odd to me, as instruments are but mere tools upon which a person is able to express musicianship and creativity. I believe that even the launchpad is an instrument, and I believe that a Roland synth can be just as genuine as an acoustic guitar.