I think all of this depends on what you want from a golf GTI. A mk2 GTI is a great car (esp. a valver) and has its good points and bad points. The mk3 GTI has more refinement, and the difference between the two cars is night and day in terms of comfort and modern feel and was a HUGE leap forward in terms of design, albeit it looks dated now, think back to 1992 tho....
I don't recall many reviews *at the time* saying how disappointing the mk3 was, although if pitched head to head with a late spec mk2 there would certainly have been a clear winner. perhaps if VW had held off and sold the GTI mk3 only in 16v form this debate wouldn't be happening now...
Also, coming into the winter months, and having had several mk2 GTI's I for one am glad to be getting into my car and finding the windows clear within a minute, the heater heats and the blower blows!
So I have a place in my heart for both, unfortunately only have parking for one, so until next summer....