SPOILERS: What fresh hell is this? - S10

[Nutz]

And Amy plays the lesser known, but equally irritating, 'Nice Girl'  card. Just because she believes she is so nice, sacrifices/puts up with so much for Sheldon, he is somehow obligated to love her. 

I believe at one time Leonard WAS actually a nice guy (dorky and clueless) but ultimately he was the harmless, nice "straight man" until the writers decided they needed to have him be a dick to make him more interesting. Amy however was never the "nice girl", she was presented as the "victim" the poor ugly/strange girl that nobody wanted to play with. The girl so desperate for someone to love her she refused to give a boy back his asthma inhaler until he kissed her. In BBT-land Amy "deserves" love not because she's nice, but because she was so sad and mistreated while growing up. (Although if as a child she was half the sickening (scenting/licking), manipulative person is is now, you really can't blame the children for not wanting to be anywhere around her)