I voted for 1963. It's a nice, clean typographic design featuring our pal Mr. Met.
I also like the 1997 cover with the lenticular motion image affixed.
Incidentally, for those who may not know, the 1982 edition has a feature showing covers of all the earlier yearbooks... and if memory serves me right they gave away copies at the end of the '82 season, either on Fan Appreciation Day or on the last home game of the year.
You know you're all grown up when you eat Lucky Charms cereal and don't pick out the mini marshmallows before pouring the milk.