I think that sums them up pretty well.
Main complaints used to be water ingress (via windows, missing gromits, badly fitted seals, sunroofs - I think if any part was meant to keep water out, it leaked on some vehicle). Petrol engine problems (coil packs) Diesel engine problems (EGR valves, turbos, MAF and numerous other things. That's just the problems we had at work) Autobox problems (and nobody could sort the piles of crap) Door switches Central Locking
And there was many other problems.