I feel like I need to scream at some fans and tell them this. I'm going to start on Secret History because I am dying to know more and already accidentally spoiled myself a little when I was googling about Kelsier. Anyway, loved the series, loved the set up and loved the ending.

Some things I was curious about:

1. What happened to the other side of the world when Vin spinned it at the end? Did no one live there? Was the population and cities concentrated in just one side of the planet?
2. Why did Ruin not stop Vin when she plugged the ash mounts and wiped the world of ash? Everything she did after he stopped her. Was it just that he knew it would accelerate the world's ending or he was away and unable to do so?
3. Sazed said he spoke to his friends at the end, I assume he meant Vin and Elend. Do other books talk about where they went?
4. I still feel very lost about how Lord Ruler maintained his immortality. He burned the metal he stored his youth in and it restores his youth? But he still had to drain himself of that first. Also does this mean he looks young unless he's draining? Or he only looks young when he wants to and can't do that for long.