I think '60s watches (or reissues thereof) will always be the most popular, since that was really the decade that watches came into their own as lifestyle pieces. The real period IMO is 1953 (introduction of the Zodiac Sea Wolf and Blancpain Fifty Fathoms, the first dive watches) to 1972 (introduction of the Royal Oak, the first "luxury" steel watch) but the 60s was when all the major players of today found their niches really.
Mid '70s watches through the early 90s tended to focus much more on design statements, since that was one of the few ways they could differentiate themselves from quartz.
How many are looking for birth year watches? Well, not me - I was born in the '80s, so not much to go for there unless I want a Swatch
😀😜uke:
😀... Could try to find an '80s Speedmaster Professional but those are really hard to pin down the years of, plus they were the same spec between 1978 and 1989 or so.