I sorted my first box of nickels the other day looking for anything old and interesting. I got three 1942 war nickels, a few 1950s, and a big handful from the 60s.
At this point I am not stacking anything but the older ones but its much more enjoyable than hand sorting pennies. I think its because the dates are bigger therefore easier to read and they don't seem quite as dirty.
Nickels are for when I run out of halves to search, and pennies for when I run out of nickels.