There's no denying that its a very competent all rounder. It's a decent looking car, build quality is generally quite sound (except for the odd rattle), performance is good rather than exceptional, the interior is lovely and practicality is very good. Although MPG is nowhere near what VW claim it's still relatively acceptable IMO, running costs and insurance for the car like this is amazing.
However, I'm a bit like yourself in that I get bored fairly quickly and will definitely be looking to move on to something else in about 18 months or so.
In terms of what else is out there that would give everything your looking for then there's not much. The R obviously comes to mind however I believe the boot is a fair bit smaller due to the AWD system.