Broken Base - Every album except the first two has fans arguing that it's good or bad. It's a good indication that when 100 fans were surveyed as to which songs should appear on their Greatest Hits Album that there was no song that appeared on everyone's list. Yes, that includes the popular, iconic Oasis songs like "Live Forever", "Wonderwall", "Acquiesce" and "Don't Look Back in Anger". The base is just that broken.
First Two Albums Win - All Oasis fans with very few exceptions like the first two albums, and to the general public those albums (along with two popular non-album songs from the same era, "Acquiesce" and "Whatever") are Oasis. As to the others... see Broken Base.
Germans Love David Hasselhoff - "Don't Go Away" is a well-liked album track in the UK, but one of the band's biggest pop and rock radio hits in the United States. It's the reason they played it on Saturday Night Live in 1997 as opposed to their current single at the time, "Stand by Me".
Similarly, "Champagne Supernova" was not released as a single anywhere else but the United States, where its probably their best known song outside of "Wonderwall".
Painful Rhyme - Liam Gallagher is frequently accused of relying on a rhyming dictionary for lyrics.