Stargate was such huge part of my childhood! To this day I remember almost every episode of the original SG1. Atlantis ran on cable which we did not have, so the first time I saw it was later on in my adulthood. Sure, Star Wars, Star Trek, Expanse and BG are all great, but man, SG1 will always be my absolute fave.
Honorable mention goes to Farscape - what a ride that show was!