I'll throw my view in. I've got pretty catholic taste and love lots of kinds of music from country to rock but with a big jazz thing.
In country its Jim Reeves. Just a few songs but He'll Have to Go especially.
ELO have their moments for me too.
The other Guilty Pleasures are those pop or dance tunes that get under your skin. You know you'll hate them eventually but Kylie, Cant get you out of my Head , Beyonce, Dangerous in Love, Avalances, Since I met You all get stuck in there...