Im sure it was the mk1/2 for Vix as shes only a touch older than me (shes 21 i think
)
its all about age imo ... what u were brought up with.
I dont think it is about age. I grew up admiring beetles and campers but im not that flippin old! I think with me its about making an old car look nice. I think the older cars have more character and I like things that are less common, they more likely to be admired and talked about then. 
I think age and when you were brought up has got something to do with it, but maybe not that much.
Being born when I was, I grew up with VW's in the family from a P reg Mk1 to a Derby, to a Mk1 Jetta to a Santana (Passat saloon). So that was a major influence, but I could have quite easily become a (cough) XR2 or XR3i fan (cough, washes mouth out with soap

).
So, I like the Mk2 and Mk1 (preferring them to the others), hence I have my eye open for a nice Mk1 now.