I would say I am a U2 fan. The Joshua Tree, The Unforgettable Fire are my most favorite albums. Their earlier stuff such as Boy, October, and War are a little spotty for me but the albums I mentioned as well as Achtung Baby, Under A Blood Red Sky, and Rattle And Hum; these are the albums I listen to most and in their entirety. I was able to see them five years ago on their Joshua Tree anniversary tour and it was a fantastic experience. I snuck my dslr into the show and got some really great images. I have 12 of their studio albums, a few compilation albums, and others.
I wouldn't say I am a fan of U2 but I remember watching them on MTV when I was a kid. I found their videos really interesting. I did not know anything about the band until I started hearing about Bono in the news for his activism and philanthropy.