The memories stored in a pensieve or in vials to be later viewed in a pensieve are accurate and not tinged with emotion, at least as far I remember.

Why is that? Particularly overtly emotional memories, it seems odd that pulling them out of your head and sticking them in something would somehow get rid of the emotions.

If someone say, watched one of their best friends die and then stuck that memory in a vial, and someone else watched it, wouldn't that affect how the third party could see that memory?