It seems that Dave likes the later years in a decade, as far as age is concerned, such as 46-the end of 49.
I quite disagree, without making an argument of it. I visualise a decade topographically - starting on the plains, the years rise cheerfully to a plateau before sinking towards the nines. So, as far as I'm concerned, the ages ending in 8 and 9 are the ones not to like. Especially 9. It's like standing with one foot about to drop for a whole year.
I can't say that this is reflected in the events of my life particularly, it's just a feeling. I'm certainly not superstitious about it. I prefer not to pass a decanter of port the wrong way (not bothered about a bottle) but otherwise, I'm fairly free of superstition.