Octavia vRS.
When raining the water runs right down the back and tips into the boot when you open it, good design!!!! So you end up holding it halfway up for like 5-10 seconds in the rain... and even then some gets in. There's a mod to fix it apparently though so might have to get that done.
There are a couple of rattles now (2001) but I put that fully down to me installing my own sub+amp
That's it really, good solid car!
This is the most annoying thing with mine too (Oct vRS). The fix - putting silicone rubber crap along the bottom edge of the rear window - apparently works, but i'm too scared to apply 'stuff' to the car incase I mess it up somehow!
Only other annoying thing is the offside passenger door often doesn't unlock with the rest of the doors. Often am pressing unlock on the remote several times! Garage can't replicate it so don't appear to be allowed to 'investigate' the problem, for example with a multimeter or eyes.