I'm into sea shanties.
They're usually classified as folk or world music but they can also be under the heading of fusion, rock, Celtic, or occasionally country western depending on national origin of the band or artist. Oddly covers of the same tune can be under almost any of these heading. There often challenging to track down. I'm fascinated by the history and origins of these songs. I enjoy that they are often sung a cappella with rich harmony and interesting rhythm. I've found music of this type sung in French, Hawaiian, English, Portuguese, Inupiat, and Irish. I would like to find more in Spanish, but it can be difficult to find songs sung in a language I don’t speak well.
I have enjoyed Enya but find it too bland for my taste. For Celtis I prefer Silly Wizard, Talitha McKenzie, or Mouth Music. I also like Marc Gunn.
My all time favorite is the CD Singing the Fishes by Ewen MacColl and Peggy Seeger.
I'm currently trying to get ahold of a CD by a New Zealand band, Jackie Tar. No problem with the language; the difficulty is with monetary exchange.