I have the opinion of 'I love it' or 'they're crap' because that's how I view most cars.
Enzo - too many computers, and looks like it's been designed by a squirrel.
Zonda - too much attention to detail makes styling fussy. Capable mechanically though.
Carrera GT - just not that good compared to the others. The Audi of supercars (no one will notice you in one anymore).
McLarenF1 - no computers, lots of power, vaguely usable, bit too much understeer. Still my number 1 supercar
Veyron - Ugly PR exercise, neutered by huge weight and 4WD.
The McLaren and the Porsche (and I hate 99% of Porsches so far) are easily the most characterful. The MC12 thingy would be, but it's just an Enzo underneath.
So whilst you can the BEST car on earth, I might hate it. But you can have the worst car on earth and I might love it. If I neither love nor hate a car (i.e. it's in the middle) then it'll usually get's filed under Grannies Shopping Car or Completely Disinteresting or Computerised or 4WD (or cross-referenced under several).
Now you know the Tristan Guide to Rating Cars (abridged version).