Very few major problems for example:
Headlight switch replaced at 96,000 miles.
Indicator stick replaced at 90,000 miles.
Mud flap had to re-attached after falling off.
Brakes are stodgy and you'll learn to use them early if you drive one of these!
I bought it on leaving University as a cheap car to get me around for the first year or so in the real world. Two and a half years later, I am still driving it!
Wonderfully reliable, it has never let me down yet, even on icy cold mornings when I desperately want it to break down!
It has excellent fuel economy, so is cheap to run. I usually get around 35-40mpg.
Service costs are high if you got to a VW dealer, however I've found that independents are as good and half the price.
1.3 injection engine is quite nippy - faster than you'd imagine and good for driving around town. It's not bad for motorway driving either - quite happily cruises at 90+ in the fast lane (much to the annoyance of company car drivers!)
Hehe the brakes, I'm forever crapping myself in the passenger seat of other peoples cars as in my mind, I'm braking about 5 seconds and 50 yards earlier than they do :D.
Its all in the feel however, when you need them in an emergency they come through. you just have to press unusually firmly in everyday use.
Having recently purchased a VW Polo I understand completely what you mean however I think it is a lot more fun to drive than most cars on the road.
PS. You just can't beat how narrow they are once you get familiar with it you can fit through any gap! Usually to the annoyance of big car drivers who have to wait while you accelerate off!