Originally Posted by ka5ysy
...make it a designated track-day bike and enjoy what the bike was built for, and let the wife know and agree to this...
This is the only answer for your sportbike; with no headlight or license plate. Do you have a track near you? Maybe your wife wouldn't be so afraid of the speed if there were no cars or traffic involved.
If you can only have a street legal bike, I think the fun factor can be found in a big supermoto. Does the name Ducati screem sportbike? Get an Aprilia; still Italian, still exotic. The Aprilia Dorsoduro or KTM 9x0 SM could both be considered a "dirt bike". Big supermotos are just dirt bikes with bigger motors to keep up with traffic, right?