I do love this show - but there are 2 things wrong with it:
1) Leonard, Howard and Raj are all nerds, right? But no (real-life), true nerd would EVER, EVER get laid, and yet all 3 of them have! And one of them is married!
I know this is a fictional comedy, and do have my tongue firmly in my cheek, but that would NEVER happen to a nerd in real life!!
2) Leonard has morphed into a sort of "no-longer-nerdy", self-confident "nerd", who doesn`t hold himself like someone who has no confidence with women (and who has slept with "Stephanie, Penny, Leslie Winkle, Raj`s sister, and has Frenched Alice, the comic book girl - again, completely unrealistic) - once a nerd, always a nerd!
Only Sheldon is as Nerdtastic as ever, a person who is still completely mystified and vaguely frightened by the female form!
Bring back the nerdiness!!!
(for me, the best episide is the Bath item Gift Hypothesis)