Big balls. Athletic build. A sense of humor.
Can't really tell until you grow and harvest the resulting seeds from several males on a female. Then you start seeing which males made the best crosses. There can be more than 1 "thing" though. Personalities are different. The plant needs a diverse gene pool to survive different conditions through different seasons. And the plant is good at making fiber and protein packed seeds, which we needed. What a great friend.
Growing indoors, you can select for whatever you want, potency, coloring, production, aroma...