I used be the same when I had my gen 6....loved it when it was all working then as soon as something needed replacing or something broke when Ive just spent loads of money I'd hate it! But as said above I just spent some money and enjoyed a good drive to remind myself how good they are, and I loved it again.
I bought a gen 7 140 a few weeks back and I love it but I'm sure I'll swear at it at some point!
Mine had a lot of rattles in the boot so I got onto them straight away as I knew it would annoy me, I found it just to be the trays either side in the boot and the parcel shelf. So didnt take long to fix with rubber strips under the trays and rubber piping on the aside edges of the parcel shelf.
If I was you I'd refurb the wheels, give the brakes a good service.