Flying from Aukland to Christchurch a few years ago, I could follow most of it on a paper map I had with me, and at one stage the steward pointed out where his parents live.
The time I realised I needed to get a life was when I was flying into Sharm and thinking to myself "hmm, that's a great rift shoulder", when someone behind was talking about mountains (the problem of being a geologist working on Middle East structural geology)