I'd never turn off the traction control on the aristo :) Too much car and scares me to imagine going sideways in it.
Although i also have my Lotus Esprit Turbo which doesnt have anything at all, doesnt even have an ECU being a Carb version so no ABS, no Power Steering, no Traction Control.
Its just you, the car and the road. Scary thing to push hard but respect it and it respects you.
I have also had many Supra's and Celica's.
All my celica's had no traction control etc, one of them (rip) didnt have ABS either.
The few times i lost the back end out on the supras wasnt too bad, even my 400+bhp one was easy enough to bring back into line.
I'd say it all depends on how used you are to having the car do the work for you and also what type of car it is.
I think they are a good thing to have as it could save your life one day, although i agree such things do take away a lot of the enjoyment/feeling of a car :)