When I was doing 25k+ a year, I had a leggy diesel hatchback and a toy car for fun. Was the cheapest way to get my motoring thrills, and punting a lazy older diesel around made me appreciate the performance of a lighter agile car all the more. The other good thing was that I'd park the diesel anywhere and not give a damn. Not suggesting a GTI is a car to be treasured (only a hatchback after all... flame suit on), but it's a bit more interesting and worthy of a bit more respect and care.
Might not suit your circumstances, but a 4-5 year old repmobile is a cheap way to travel. Failing that keep the E30, buy a Toyota Aygo and a mask - they're great on fuel and surprisingly good fun!