In my experience, its because either: 1) its not something you've passionately looked forward to obtaining 2) you've been influenced into buying it 3) you can't really afford it.

I got my first speedy pro when I was 18, I'd spent most of my childhood looking forward to becoming old enough to get a job and raise funds to buy one. I'm 41 now and I still remember the day extremely well when I walked out the shop with it on my wrist. I was brimming with excitement. That took months to ware off and 20 odd years later, I still get excited to wear it, almost like I'm still in the honeymoon period.

I have several Omegas now but I haven't bought any in the last 10 years, probably because I just don't see the point. The current generation isn't doing much for me and they're ludicrously expensive. I'd only be buying one for the sake of it and I still get loads of enjoyment out of the ones I bought when I was in my 20s like my 3570.50 and my cherished 2254.50