http://www.golfgtiforum.co.uk/index.php?topic=161069.40;topicseen
As the mk4 section has a post linking to it so should we 
What makes you think people here would automatically vote for the Mk6?!

I had to vote Mk2, because it is simply the best GTI and car I have ever driven and I have driven a few cars in my time. I have some perspective on this from the fact that I have owned mint examples of the Mk1, Mk2 8v and 16v, Mk3 8v and VR6, Mk4 1.8T, Mk5 GTI, Ed30 and R32 and drove a Mk6 GTI demonstrator for a whole day last summer when they first came out (I have now ordered one).
If I was to place in order of best to worse, I would say, Mk2 16v (

), Mk5 GTI/Ed30, Mk1 GTI, Mk6 GTI, Mk2 8v, Mk4 1.8T and finally Mk3 8v...