Tell me about it Craig, I thought I was nearly there, then driving the GTD threw me into confusion !
I was convinvced it wasnt for me, it was GTI or go for basic model, but driving the GTD felt very similar to the GTi..
Craig says it all as think as all those having same dilemma are happy with the final choice be it either the GTi or GTD and that mainly comes from the driver experience being so good for both that you never felt like cheated self in making the wrong choice.
Running costs took my priority so it was GTD but in normal driving conditions I am hardly left slouching in the GTD especially when use Sport with the DSG.
Looks good to, the Nogaro wheels really stand out and when you ever see old model Audi A3 like personally had you realise how baulky and dated it looks. Still genuinely gets looks now (maybe more if ever get to clean the winter grime off it)
90% of time though am in 'comfort' and just moving around in the traffic like everyone else and it excels in these conditions.
GTi will give the bigger smile when pushing it but maybe not by as much as would think and does have the badge kudos but most of the time they both perform quite equally day to day, except in MPG (though GTi is very good really when see numbers put up here)
I call the GTD the 'perfect compromise' when ever asked about it. But think from this forum and honesty within it you can be quite assured that there is no real wrong decsion you ever be cursing.
Keeping the GTD long term as the family needs a comfortable 5 door with long distance capability and economy and can see it doing that for me next 10 years +
In 2016 will be going the R/S3 3-door route for that weekend driving you alluded to.