Re-reading the Envy fight scene in Gluttony's portal made me realize how much Edward cherishes life: How deeply the death of Nina affects him, how he tries to keep up his moral to never kill (this is especially emphasized in fma '03), how he sees 48 and 66 as human even if they don't consider themselves as such, how taken aback and upset he is when he realizes the talking faces on Envy used to be people and how difficult it was for him to use Envy's philosopher's stone to escape Gluttony's portal, how in awe he was when the baby was born in Rush Valley, his rants about how alchemy has never been able to create life but humans can do it within their own bodies. He blurs the line of human and not human and even considers those with little humanity left as human beings even if they themselves find it ridiculous. I don’t think anyone sees humanity the way he does.