Roger Whittaker
Marty Robbins
Pretty much anything that was ever on the US TV show "Hee Haw"
Basically, anything my parents listened to when I was a kid, which made me roll my eyes. Now, 40+ years later, it brings up powerful feelings of nostalgia.
I don't think I particularly "like" it now, per se, but to hear things that you used to hear 20 million times a week 40 years ago, that you haven't heard for 30-40 years, kind of brings back the whole experience of being a kid again, at least for the 3-4 minutes the song lasts. It's a bit of a rush.