May tremolo, masyado madaming pickups, may pickguard, tree of life inlays (yuck talaga), monkey grip on the JEM models tyaka parang yung overrall design nya parang ang metrosexual ng dating. Di ko talaga trip.
That was also one of my impressions about Vai's guitar. As if there were so many things.
Later on, I understood one thing : your guitar is your instrument. It represents/reflects who you are : your imaginations, your artistry, your feelings, emotions etc.
Perhaps, Vai's guitar is an extension of himself, a mirror of his personality and musicianship, and his preferences.
Artists are free to use everything in their power to express themselves. And of course, it is his signature guitar, so he might as well put his "signature" on it.