Beverly Hills, 90210

If Beverly Hills, 90210 isn't the blueprint for teen dramas, then I don't know what is. This show has it all: love triangles you could study in geometry, hair that defies gravity, and enough drama to fuel teenage angst for centuries. Fans? Oh, they've turned episode dissections into an Olympic sport. And let's not forget the cultural earthquake this show triggered—every teen suddenly needed a brick-sized mobile phone. Debating its GOAT status? It's like arguing if water's wet.