The cars/vehicles that I hate at the minute are:
Chrysler Ypsilon, for its design alone (Midget PT Cruiser/Lancia/Alfa wannabe). Looks awful, driven by people who are scared of tarmac.
BMW X5: driven by people too distracted by either in-game entertainment and/or little Tarquin,and have no road sense or awareness of what is happening outside their bubble.
With regards to the RCZ: I have a colleague who had one of the top spec cars (2nd hand). It was just out of warranty and the engine blew. He was quoted about £5000 for a replacement engine and had to write it off, selling it as spares and repairs. He reckons he lost about £3k