I noticed the Eastern/Western thing in his music comments too. I think it's interesting ZUN is thinking about this, as well as other aspects of the song (style, pace, how it goes with the stage/character/danmaku, what feelings it invokes). I feel like this is something ZUN does that many other game designers don't focus on (well it might not be their focus for the game, while it definitely is for ZUN, so all's forgiven

). And this is why I love Touhou music. Listening to the music always brings back the same emotions and imagery I experienced when I first heard the music in the game, which is what makes it special.
off topic: has anyone found a remix of the song playing when fighting the 5 orbs in Touhou 2?
Did a search using
http://www16.atwiki.jp/toho/ and found only 1 listed arrange of that song.
Circle: Zephill
Album: 東方幻奏箱
Track 03: Stake life on conflict
There might be other arranges though, since that site doesn't have everything.