I think Tassie would be good for you - nothing like a bit of nature to soothe the soul, and there is heaps of that here. On a more practical level, you won't find the same cosmopolitan vibe in Hobart (which is really just a big country town). That said, there is a certain quirkiness to Tassie and Mona has certainly shaken the place up. Also the number of people now moving to Tasmania means there are changes afoot.
As far as TAFE goes, be prepared for lower levels of literacy and numeracy here - 50% of Tasmanians are functionally illiterate - so you will encounter some teaching challenges but they are crying out for good teachers.
Bottom line, take the plunge.