The first two have a really interesting look, to my eye. Underexposed? I'm not seeing it. I am seeing some really interesting light and color on the leaves of the drying corn stalks. I like the sense of approaching storm, both in the light, the tones, and in the actual subject (clouds etc), all of these play well together here. Compositionally they're both a bit of a muddle, #2 especially.
#3 is a strong composition, nice repetition of shapes with the cloud versus the tree. It looks soft, which might be the heavy compression. Whatever. screw Group f/64, long live pictorialism, I say.
#4 feels like it's some sort of social comment, but it's not speaking to me. Strong-ish composition, I guess, but the elements aren't really cohering for me.
#5 is one of those bloody things everyone does. We just cannot leave the telephone poles and wires alone. It's a pretty good photograph, but it's been made infinitely many times, and it's never really said much, it's always just a kind of interesting looking graphic about nothing. I have a bunch of similar ones lying around, I can't leave it alone either, but I have no idea even what I'm looking for with these.