I started listening to U2 in 2000....I only had three cds...best of 1980-1990, ATYCLB, and Achtung Baby....I definently got burnt out....I didn't really listen to anything for a couple years, then I bought best of 1990-2000, and discovered there was a whole U2 universe of 90s I knew nothing about, then I got bored again....and then HTDAAB came out, and I finally saw the band live, and I got Pop, Zooropa, War, and The Joshua Tree...so I'm still on my U2 high from seeing them live, and I have a LOT more music of theirs to listen to....so at the moment I'm REALLY into U2, but I'm sure it will die down in a month or so, and then I'll be burnt out on U2 again, and I won't listen to them anymore (until I finally get $150 and buy the complete U2 from iTunes)
So, I'll never stop loving U2, but everyone is right, breaks are nice, and it is so refreshing to hear a song after a year or so.