That's interesting what you say about the 3 cars. I'd have expected the TR8 to be smoothest and easiest to commute in. The TR6 looks the best (Datsun wheels let the car down but they are Datsun wheels after all). I can understand why the TR6 feels the rawest, they are simple, old-style British cars.
Z as a daily driver - I'm in a great position to sell my 370Z and run my standard Z as a daily car, even my mate up the road suggested it. Three things to consider:
My wife doesn't drive so she would have to 'sign-up' to it and that is very unlikely.
Do I want to subject my very original car to road salt, rain, wear and tear and mileage?
Thirdly I have got a bit soft in my old age (no not that way) - I like my central locking, demisting/heating, decent wipers, lights, inertia belts, sound system etc etc.