It just depends where I am working. If possible my 2.0l will go to where I am working and I get the train, plane etc down to it and then use it locally where I am; this is why I bought it in the first place when I was working in Gosport and flying down to Southampton every week.Do you run yours as a daily then Lee?
At present I am in Bedford which isn't the easiest of places to get to from mine via public transport so although I have left it down there and travelled by train to Milton Keynes etc I generally drive there and back and rotate which car I take - that way they all get used but by definition is spreads the mileage.
Having said all that, I would have no problem with using any of them as a daily, they all have fair mileage on them :
A5 - 125,0000
Z3 - 148,000
Z3M - 95,000
Sportage - 100,000
Porsche 996 - 115,000
Maintenance is the key - ironically my motorbike has only got 15,000 miles (7,000 in the last 10 years; 500 in the last 3 years) and the lack of use for it is causing problems.