What do you think of Maplestory's Music?

I love so many tracks that I lost count. Many of them really make you feel many emotions, such as nostalgia, sadness, happiness, etc.. and they're just overall great, especially the recent ones. The first ones were great too, especially some as Ludibrium PQ, as someone else pointed out.

What I noticed is that they ALL have a passage in which there are some notes in common.. played in the same sequence. ALL of them. It almost seems that those are the main notes of Maple's login screen BGM.

Anyone else noticed that?