In the past, I've been told I lacked the ability to focus on any one type of coin collecting (or currency for that matter)

probably due to a little OCD....ok a lot of OCD.
Limiting myself to regular issue
US coins and Currency is focused enough, isn't it?

Well, a little while back I started breaking my focus into filling an entire date range before moving on. First project was all regular issue
US coins from 1950-1999. That was a lot of coins, but by far the easiest of the date ranges (you'd be surprised how hard it is to fill every denomination of 1955).
Once completed I decided my next project would be 1932-1949 due to the coin shortages of 32,33. Well, I'm about done! I've got one coin left (1933 D
Wheat cent) before I've filled all dates, mints, and denoms from 1932-2006! That includes 1932 D & S Washington Qs. I've got a half dozen 1933D Wheats on my
ebay watch list.
Next project: 1922-1931 (From past collecting, I'm only short 18 coins from this date range)
These calculations don't include bullion or Gold.....yet
ASE's are almost done too....