Maybe its cause Oblivion was the first Elder Scrolls game I ever played,and that made the experience so much more unique for my first time,not sure. I enjoyed Skyrims music,and I love ALOT of the songs,but after having heard every track,they just...I dunno,I dont know how to explain it,and I cant be the only one that feels like this...Maybe its part of growing up and getting older,I just wish I had an answer as to why I feel this way.
Also,just one thing I'd like to say I prefer in Skyrim, are the battle soundtracks,I can gladly say they are MUCH better then Oblivions.
Couple Skyrim Songs:
http://www.youtube.com/watch?v=h_6utMqfR8g
http://www.youtube.com/watch?v=6nSbjbVHj40
http://www.youtube.com/watch?v=ctfEh9McKWk&feature=related
Couple Oblivion Songs:
http://www.youtube.com/watch?v=qV8qanp65-E
http://www.youtube.com/watch?v=qJugTtU0oEU
http://www.youtube.com/watch?v=VOauouzZHIc
Edit: This makes me wish I had a PC version of Skyrim so I could dump the entire soundtrack from Oblivion into Skyrim :[

I too enjoy the music in Skyrim, but to me, Morrowind's music is better, probably because it was the first TES i played. 
