GTI 5 DR DSG - 5 door essential if you regularly take more than 1 passenger. i HATE the whole climbing in and out of the back of a 3 door. even as the driver, having to get out to let people in totally sucks! DSG is pretty good, less interactive than the manaul, but more relaxing and better for WAGs. can still have fun, but not the same tb100%h.
White - Too flashy for me
18" Monza's - essential. really sets off the car better than the 17s.
Bi Xenon Headlights - I love the look of them. Makes the car stand out from lesser golfs even more. Performance wise is fine, but not essential for me in light-polluted London. I have never been flashed yet!
Cruise Control - i don't have and apart from average speed zones, would never use. like the DSG arguments, using the accelerator is a critical part of driving!
Telephone Prep Rsap(bluetooth) - i know it has less compatibility, but my phone works with it and it works great. no faffing about with after market kits and you get voice control which you don't with the fiscon.
RCD 510 Touch screen radio - looks much better than the RCD310, esp the colour scheme which is much more in keeping with the rest of the interior. (i.e. red/white rather than blue). works very well. SD card a great feature, though don't use massive capacity cards!
DAB Digital Radio Reception - not have as i wanted the reversing camera (which is absolutely brilliant!)
ACC - takes the edge off speed bumps and the pot-hole ridden roads in London. Sport setting firms up the steering nicely.
Storage Pack - didn't bother with this as the 5 door hatch is practical enough as it is
