Nice one Marc, know what you mean about easy to drive from the off, its nice and light and a car you don't have to think to much in to go at a quick pace.
Things you will miss, lack of body roll, and suspension control, power, build quality, overtaking abilty,power sliding, induction and that exhaust noise....8000rpm overture
Things that will annoy you.....body roll, understeer , lack of power, various rattles, VAG service if you get problems
Things you will enjoy, fuel consumption, though if booted comes close to M3 levels, I have seen mid teens regularly on hard runs, but averages late 20's in normal driving....servicing costs overall are lower especially Insp 2!!( 2 to 3 times a GTI service), Tyre costs.
Depreciation from new is similar %, but obviously the numbers on the Beamer are higher, so that hurts
When I go out its the M3 keys I grab for first 9 times out of 10, but the Golf still puts a smile on my face