"Jane has grown Jenna into this ridiculous comedy powerhouse. Things started to take off with her when we stopped trying to pigeonhole her into some “TV best friend” and just let her be bananas and an awful person. In the opposite way, Tracy’s character has gotten sweeter and more heartfelt as Jenna became more of a sociopath. It feels like that’s where they are supposed to be."
— Tina Fey on which “30 Rock” characters have grown closer to her heart over the years.