The only issue I have with the e-tickets is the luggage tags. (And the excitement of see the tickets in the mail box, but I guess I could adjust to that) Luggage tags that you print copies of would NEVER last through the airlines without getting torn off the suitcases. So you end up getting real tags at the pier and standing there and re-doing them all. If they sent a see of tags in the mail then the other documents being electronic would be fine with me.
Carnival Cruise Lines:
Fantasy 90, Celebration 95, Victory 05, Conquest 05, Spirit 6/06, Freedom 6/08, Holiday 7/08, Victory 6/09, Valor 9/09, Dream 6/10, Splendor 8/10,Conquest 8/11,Magic 11/11,Triumph 4/12,Spirit 7/12,Freedom 11/12, Triumph 2/13 - The fire cruise
NCL Dream October 2006, RCCL Mariner OTS June 2007, Celebrity Silhouette 2013