I always look on it as "do I absolutely desperately need to fly?". The fact is that unless 1) I was stuck in some backwater airstrip out in the wilds of the Arctic/a jungle/desert/wherever and absolutely had to get out, or 2) I had some other pressing life-theratening need to fly, then the answer is "no".
Interesting story mary meagher. I've heard many horror stories about aircraft rental in the states and some of the sheds/deathtraps that are palmed off to unsuspecting hourbuilders and somehow passed as airworthy...