Oh I've found my people! I'm a life long U2 fan, I was completely obsessed as a teenager and although not so much these days, they'll always be my favourite band and I haven't missed a tour since Zoo TV when I was 12. I've now seen them live 18 times and counting 
Achtung Baby is my all-time favourite album, but I also love The Joshua Tree and The Unforgettable Fire.
Anyway, favourite songs... there aren't many I don't like but my old faithfuls are:
Love Comes Tumbling
The Unforgettable Fire
Who's Gonna Ride Your Wild Horses
Ultraviolet
The Fly
With Or Without You
One Tree Hill
A Man and A Woman
Heartland
Slow Dancing
Stay (Faraway, So Close!)
Where the Streets Have No Name
Bad
Hold Me, Thrill Me, Kiss Me, Kill Me
Mysterious Ways
Pride (In the Name of Love) (R&H version)
I could keep going!