I have sat on pleanty of the Harleys, and got to say that the main thing that made it appear smaller wass the tank size and shape. After getting back on mine, I noticed how large it was. Gave me a great feeling...
Larger rim and tire on the rear will alter your profile as well. Rake the front end out, etc, etc,
For me bags don't do it...but again my opinion, like the sleek look of the bike the way it is. I did a few minor cosmetic adjustments on the bike, the most revealing was recovering the seat with ostrich-went the vinyl route when being talked out of the leather...big impression, and many positive comments from folks at bike week...great addition to the black retro...