Gtg: I'm not saying DSG is less sporty in itself, it's fast gear changes cannot be matched by a manual, but will that extra smidge make that much difference in the real world on an overtaking maneuvre, especially if the gearbox doesn't change gear at exactly the time you'd have done it in manual. 0-62 times are identical for manual and DSG, no savings to be made if you know what you're doing, just makes it easier.
For those that like to be more in touch with the car (and more likely to drive it in a "sporty" manner) will generally prefer manual. For some people they will prefer the extra input of a manual, for others they will prefer the convenience of a DSG. Having a DSG doesn't make it any sportier IMO, especially as it does nothing to enhance the 0-62 time.
3 doors do look better on a Golf (and most cars of that size or smaller), but not by much. The Golf is one of those cars that pulls off 5 doors with very little aesthetic penalty (unlike the A3 which looks like an estate car in "sportback" guise). I probably only have some back seat passengers 5% of the time, but when that 5% comes about, what a pain it is for them, and for you when you hear them moaning about it.
DSG is a convenience feature (that'll cost you £1100 over 3 years), nothing more than that. Some people prefer an auto, some don't. It's not a feature that will enhance the car for everyone and those that don't get it because they don't want it will not be missing out.
