For most of my flying I have been around 1 hour away by car from the airfield and this is my max. If I had not been prepared to travel that far then I would have had no choice but to give up long ago. At an hour it is practical to be at the aircraft for 9:00am and get 5 hours touring in but you are not going to fly in the evenings or socialise much after flying. I am now around 25min and that allows me greater flexibility. In terms of distance, 50 miles (one way) is the most I have travelled on a regular basis.
Rod1