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.
Accidental Innuendo: Inverted in "Summer of '69". The song title is, in fact, referring to the sexual act, not the year. (Or played straight - Word of God is divided. Bryan says it's deliberate, the co-writer says it was accidental).
Broken Base: A lot of his older fans really hate the way Adams' public reputation went from hip pop-rocker to uncool adult contemporary balladeer with "Everything I Do (I Do It For You)", from which it still hasn't really recovered, even when he's made plenty of rock records since.
Mutt Lange's production on "Waking Up The Neighbours", which makes Adams sound like Def Leppard, is a big Base Breaker. The lack of Jim Vallance co-writes on the album doesn't help.
There seems to be a portion of the fanbase who thinks 18 Til I Die is one of his best and On A Day Like Today sucks, and another portion who thinks On A Day Like Today is best and 18 Til I Die sucks. You won't find many who like both equally.
Signature Song: "Summer of '69", "(Everything I Do) I Do It for You", and "Heaven"
Small Reference Pools: One criticism of him is that virtually all his songs are love songs, no matter the musical style. Bryan and Jim knew this, and felt it was getting old, and tried to move away from it with the multiple artist charity song "Tears Are Not Enough", and then the album "Into The Fire", which features such ideas as late night criminal activity (Heat Of The Night), the struggles of life (Into The Fire, Another Day, Home Again) and historical events (Native Son, Rebel, Remembrance Day). Even the love songs on this album (Victim Of Love, Only The Strong Survive) deal with failing relationships, and the remaining track Hearts On Fire is the only truly happy love song (which makes sense given that it was a Reckless outtake). After this album, Vallance and Adams felt that writing about historical events might reveal the limitations of their own knowledge and also might make people think they were getting preachy (ala Bono), so they generally stuck to love songs later.