I have had my 03 S for a little over a year. I got it with 26,000 and now have about 46,000. So far all I have had to do is:
1) Replace a convertible tension cable. Did both even though one was still ok. Parts were $65.00, took me about 5 minutes of time. (and I am not mechanically inclined AT ALL!!!)
2) Had to have the convertible top re-glued at the base by the rear window. Cost $75.00
3) Had the oil changed, found a great shop that I trust and good word of mouth. Cost $85.00
4) Fill it full of gas. Lord knows how much that has cost me
I have noticed that my headlights won't turn on about 5% of the time, so I am sure I am going to have to replace the switch in the near future.
So let's see..... 10 year old sports car, driven daily, driven "enthusiastically". Repair/maintenance cost $225.00 in a little over a year and 20,000+ miles.
I'm good with that.
Remember these boards are where people come to find out about problems they might be having. It is not going to be a balanced representation of Porsche ownership.
Don't be paranoid. Drive her like the good Dr. ordered, and smile....