The
Transformers cartoon was the lynchpin of my teenaged afternoons. Prior to that
I began watching it when if first appeared on Sunday mornings, while syndicated
animation was figuring out what to do with itself.
Note- I'm pretty sure it was Sunday morning, but I can't find a reference that doesn't say "Saturday Morning" or "Weekdays." Maybe Sunday was only G.I. Joe? Being a teenager that early in the morning on weekends led to grogginess, but syndication was also highly variable back then. Your mileage may vary.
Regardless- the main viewing was after school, frequently with friends.