Like an old married couple

[Gamma]

Mismatched couples can be interesting if the couple has chemistry and it's done right. Some of those examples of the "best" mismatched couples, really. George and Susan. They killed off her character to untethered his. Of course I believe that chemistry should not be used in a sentence describing Leonard and Penny unless the words lack of precede it. Some of the other example seem fairly meh as well. Couldn't they find some more dynamic pairings?