There's no particular order :
Renault 5 Turbo II (260 hp in a Renault 5 !!!)
Citroën SM , because it's so... strange, and very revolutionnary when it came out in 1973 (not sure for 1973...)
Ferrari F40, the be(a)st !!!
Peugeot 206 RC, for an everyday use
Maserati Quattroporte, because... it's a Maserati (sick of seeing Mercedes/BMW/Audi everyday)
Hummer H1 only for driving in Paris or on the périphérique (the one who have already driven in Paris will easily understand why

)
Citroën Traction, to drive the first traction (at least the first on mass market)
Bugatti EB110 (Bugatti blue only), my favourite supercar, maybe because it's the only one i've never seen
Jeep Willis, certainly the american car I prefer (not only for design or motor reasons...)
And of course, the Renault Fuego, THE car everybody loves :
'But, it's not a car, it's a Fuego !' -J. Paul II
'Meeeeeow' -My cat
'My favourite car' -Bush Jr
'Who is the designer ?' -Hannibal Lecter
'Nothing compares my Fuego' -Marylin Manson
'I don't wanna buy this Cadillac, I want a Fuego !' -Tom Cruise
'If I could, I'd race with my Fuego Gti' -Michael Schumacher
and much more, but there's not enough space