I was born in the 70's--so my JW memories of the time are few and hazy.
I remember the early 80's a little better...and can compare it to the 90's and all the way up to 2009 or so. And my memories of the late 70's and early 80's were a more of a inclusive, social group. Renting out skating rinks. Large congregation gatherings. JWs seemed warmer, friendlier and more sincere.
As Sir82 pointed out: JWs were readers, knew their own teachings and could argue them at length at the door.