AvatarVidyanand Nilleflipped into PicksFlipboardIcon version of the Flipboard logoStudy: Average Person’s Enjoyment Of Vacation Drops 36% For Each Additional Family Member Presenttheonion.com - The OnionCOLLEGE PARK, MD—Finding consistent results across all types and durations of vacation, from multi-week cruises to brief weekends spent camping, a …