Being an Irish musician by trade and birth, I tend to hear a lot of songs and tunes that many people don't have the pleasure of listening to and truly experiencing. I also have a love and appreciation of music that I'm sure many do, but it really got me excited when I went into a Skyrim pub for the first time and heard a familiar tune in the background. It wasn't exactly right, but the similarities between Skyrim's tavern music and a Scottish song that I perform called "Are Ye Sleeping, Maggie?" just helped to add a bit more depth to the game for me. Here's a comparison between the two; I'm sure you'll notice that the chorus melodies are very similar.
http://www.youtube.com/watch?v=t2_qe32j7l0
http://www.youtube.com/watch?v=7u78hf_Dl4g
I know that they aren't the same song, and I'm not saying that the composer ripped anyone off, just that the melodies are similar. I hope you enjoy the music.