doctorwho
Rock n' Roll Doggie VIP PASS
U2 became huge on hits in the late 80s and early 90s. They became huge again because of hits in the early 2000s with beautiful day and vertigo. This isn't very hard to figure out.
Music lovers/critics may love albums... the masses love hits. And its the general public that makes a band huge, not people like us. That has always and will always be the case... long before U2, and long after them.
Famous U2 songs that the crowds adore that were NOT big hits (based on the U.S. Hot 100 charts):
I Will Follow
Gloria
Sunday Bloody Sunday
New Year's Day
Bad
In God's Country
All I Want Is You
Until the End of the World
Ultraviolet
Stay
Elevation
Stuck in a Moment...
Sometimes You Can't Make It On...
And a few recent ones such as Magnificent and Moment of Surrender may join that list.
Even Zeppelin and Pink Floyd had hits. Hit songs are what gain attention to an album. But the fact is, those bands are better known for having solid albums than hits. U2, for the most part, is the same. The songs I mentioned above are considered amongst U2's classics, yet none broke out big. Hence, people knew them for U2's tours and from U2's albums - the same way people learned of many Zeppelin and Pink Floyd songs.