Close 2nd would be Little Things cause its so heart wrenching and emotional. I try not to listen to this too much since even the pre chorus starts tearing me up. (Would've choosen this as #1 if this wasn't the case.) Possibly Bono's most naked lyrics and singing since "Sometimes"... maybe even "One" if you wanna stretch it.
3rd is Red Flag Day cause its catchy and rocks.
4th would be American Soul cause it ROCKS and Kendrick.
& 5th is Landlady cause I feel like gliding through the New York skyline everytime this song comes up.