I have Worked All States on several different bands...Have 100++ different countries worked.
This being said to add "challenge" to making contacts "On the Air", many 10/6/2 meter+ operators have adapted the "Chase for the Grids".
This adds a whole different realm of operation to landing some of these RARE grids, where ZERO operators exist, or where operators are in limited operation.
I have a "few" RARE ones in US.
EL58
EL94...EL93
CN74
DM03
FN53...
Many other examples, those just a few.
Many in Canada, where population is almost non-existent, let alone operators.
Many Island "grids" in the Carribean are really tough catches.
Chasing the grids adds another dimension to the skill of ones operating.
The I worked BLAH...BLAH states today is OK for some to call that
DXing,
...
but for those of us with 40++ years of operating, that have been there done that many times, this just keeps the fun going.
All the Best
Gary