The Disappointing Child by Beverly Hofstadter.

Raj: I didn't want anyone to feel bad at the end of the game. Some of those puzzles were really hard. I didn't know who was going to get Penny.
Penny: Run.
Raj: That came out wrong. But you have to admit you had a wonderful time.
Penny: Run to India.

Sheldon: To the planetarium!
Penny: Let's go!
Leonard: To the Tar Pits!
Bernadette: Let's go!
Amy: There's a Neil Diamond concert next month.
Howard: Let's go!

Penny: Oh it's a blowing alley.
Sheldon: Yes. My brain is better than everybody [holds up bowling ball].

Think of Sheldon when you apply it.

Penny (hands Howard the coupon)

Penny: "50 cents off Vagisil"
Sheldon: Think of me when you apply it.

Penny: He's still mad at Leonard, huh?
Amy: Well, he's mad at you, too. He said you were the succubus that led his friend astray.
Penny: I don't know what succubus is, but it has "suck" in it, so that can't be good.

Leonard: I didn't tell Sheldon so we could have a few days alone.
Penny: Oh, that is so romantic.
Leonard: Uh, sure, that's why I did it.

Sheldon: Well, if it's any consolation, i'm sure Leonard's tormented every moment he's away from your warm embrace and cherry lips.
Penny: Thanks.
Sheldon: Oh, seriously?

Penny: You know what the worst part is?
Sheldon: That you're having to process your emotional pain without vodka?
Penny: No. Yeah....

Penny: I cannot believe we were missing that jerk.
Sheldon: You were.

Penny: I'm calling him.
Sheldon: Oh, goodie! Put him on speaker phone.

TBBT Quotes

Sheldon [to Kripke]: Also, I am given to understand that your mother is overweight.
Raj: Oh, snap.
Sheldon: Now of course, if that is the result of a glandular condition and not sloth and gluttony then I withdraw that comment.

How is "doable" anything but a compliment?

Wolowitz