How did I forget blade runner! Awesome film. Not so keen on Her though. It past the time but I doubt I'll watch it again.

With you on walking dead, started really strong but just seems to be the same story told over again in a different location. It's tough to keep a series feeling fresh.

For sci-fi film I'd have to go Interstellar. Loved it at the cinema the soundtrack is incredible and must be listened to loud.

For post-apocalyptic probably 28 days later, for the grittiness.