
...to Penny's QUALITY of life.
The Big Bang Theory Season 1, Episode 2

What's the thanks I get for turning
Leonard into QUALITY boyfriend material?
The Big Bang Theory Season 4, Episode 19

If I'm in, I'm in for the whole run,
even if the QUALITY declines.
The Big Bang Theory Season 8, Episode 24

Even the government doesn't care
that much about QUALITY.
Breaking Bad Season 3, Episode 10

Not an attractive QUALITY
in a woman, Leonard.
The Big Bang Theory Season 4, Episode 20