These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Hilarious in Hindsight: "Rockstar" uses the lyrics "I'm gonna sing those songs that offend the censors". When the song was released as a single, it ended up getting censored.
The band lambasted Guitar Hero, which, at least in their opinions, detracted people from learning real instruments. Two years later, their songs are on Rock Band.
Jokes about people hating on Canada because of Nickelback become funny when you realize there is a Canadian musician far, far more hated than them.
It's Popular, Now It Sucks: What many of their older fans think. And for a band with such a vocal Hatedom and so few people claim to like publically, you'd think they'd get less airplay and make less money.
Memetic Mutation: The whole "Nickelback is the worst band ever!" thing has shades of this.
Misattributed Song: The Spider-Man single "Hero" is often attributed to Nickelback, when it was a Chad solo song, along with Saliva frontman Josey Scott. (with Chad's brother Mike on the bass, MattCameron on the drums, and Tyler Connoly on guitar)
And Tyler Connoly was a last minute additions. Originally the guitar solo was supposed to be recorded by Jerry Cantrell.
The song "Into the Night" often suffers this too. In actuality, it is a Santana song which features Chad Kroeger (vocals).
Ditto for "Why Don't You And I?" despite the obvious presence of Santana's signature guitar, although most radio stations played a version with The Calling's Alex Band on it instead.
Mood Whiplash: Often induces this from song to song, to their detriment. Many of their songs' content comes off as earnest and emotional and can sometimes border on Silly Love Songs. Then they come out with a tune like "Animals"... and many more like it.
Although "Rockstar" was used heavily in some sofa commercials in England, which can be seen by some as putting it in the league as other songs used in adverts. Not to mention it had a large amount of airplay on the radio, still a really great song though.
That and "Into The Night" (though it's Misattributed.) Also "This Afternoon".
Likewise even people who hate Nickelback admit to liking "Lullaby" because of how close to home the lyrics are for many people (just look at the YouTube comments on the song)