I thought about this for a while with mine - a big DS is just going to be a big SuperMotard and we all know how much fun they are. My first experience of a 'motard was a Husky 620 my friend built. I rode it at a track day, and bearing in mind I was racing a full on SuperSport ZX6R and Superbike ZX7R at the time, had more fun on that thing than any other bike I rode that year.
Handling could be interesting, it would liven it a lot by steepening the head angle, and suspension is going to be crazy soft with grippy tyres, but you got big old bars to grab it by the neck and throw it around. You'll be surprised how many sports bikes you can embarrass with your elbows up and your foot out.