Or, Sheldon is an inconsiderate a-hole, who thinks being smart justifies side-stepping social norms like treating people like actual human beings. Sheldon has been fortunate enough that he has been surrounded by people with good hearts that overlook his behavior, but the irony is that is also enabling said behavior. Amy's speech to him was long overdue. Well, I think each of the cast has given him similar speeches throughout the series, its just from HER on THAT night in THAT context finally made it stick.

I don't have a problem with anything...except Raj. He should have gone to London to be with Anu. So he remains the only one un-coupled but goes on wacky [sometimes one-sided] dates (the Sarah Michelle Gellar cameo)? Meh. I'd like to think they're saving him for a spinoff but Lorre said there's no plans for now for future spinoffs.