From my experience, puppies are happy little sponges ready to soak up attention......or they should be IF they are genetically sound!!!! A puppy needs to be confident yet cautious, happy yet discerning.....these are GENETICS!
The whole idea of "socialization" has gotten to be popular due to the amazing numbers of GSDs being produced in this country....probably 80% (and I am probably being generous) of which do not have a sound genetic makeup....these pups need additional help to be safe and solid members of their families and society.....
Socialization opportunities are or should be taken advantage of for some basic manners and obedience imprinting....not jumping, attention/focus, stays and releases......when your puppy NEEDS to be socialized to be approachable, to be handled, to walk with you without hiding, hackling or grumbling - then you have a puppy whose genetic makeup is NOT 100% sound.
Hexe Sch2, Komet & Kougar IPO1, Kira HGH, SG Bengal, Lynx v Wolfstraum ~ Ziberia IPO1 ~ ATB Basha, Kougar & Kyra, Fenja, Sch3s, Cito, Sch2, DangerRH, Csabre & Alice Sch1s ~Kelsey