onwaytobeATC
Don't sweat the Area/Approach decision at the moment. Both have their up-sides and drawbacks. You will find very few that are in either job that hanker to be on the other side of the fence. Think of it more as a choice between Angelina Jolie or Kelly Brook [or Brad Pitt / Johnny Depp if that's what floats your boat].
NATS training is free, so make the most of it. You can always quit and bugger-off to some other training establishment at a later date if NATS doesn't make your dreams come true. Quite a few have joined with that intention. Most still work for NATS
[Possibly indicative of a lack of imagination rather than love of their employer]
