Loved Tassie, did a 14 day road trip around 2012 with another couple (I'm separated now), loved the scenery, history, people and food(scallop pies WOW!) , it was an hysterically funny holiday as well with great company.Tassie great spot to travel.
I think east coast is better than the West side.
Cradle mountain also good.
Penguin and the nut not bad aswell.
Went back last year to do the 3 Capes trek with my son, will definitely go back again to do some more trekking.