- Covered Up: Many rock listeners may better know his songs from covers by performers such as Joan Baez and The Grateful Dead. On the other hand, he himself covered up a number of other performers' songs, such as Townes Van Zandt's "Pancho and Lefty" in his duet with Willie Nelson, or Tommy Collins' "Go Home".
- Glurge: "Grandma's Christmas Card," a soggy bit of filler from Merle Haggard's Christmas Present which ends with The Reveal that Grandma was Dead All Along. Songwriter Randy Brooks was apparently so appalled by its shameless sentimentality that he wrote "Grandma Got Run Over By A Reindeer" in response.
- Misaimed Fandom: "Okie from Muskogee" was supposed to be satirical, but most people never caught on. Interestingly, the Hag now plays it straight.
- Signature Song: "Okie from Muskogee," "Workin' Man Blues," "Mama Tried," "If We Make It Through December," "Big City," "Pancho and Lefty" (a duet with Willie Nelson).
YMMV / Merle Haggard