List of games I have played in the order I like them...
1. EoSD
2. PCB
3. IN
...
List of all games including ones I don't have/haven't played in order I like them based on what I know of characters/have seen on youtube/read on wikia, etc.
1. PCB (Ran's theme, Chen/Ran/Yukari fanworks are touching sometimes)
2. EoSD (Hong Meiling, stage 3 theme, Flandre, U.N. Owen, Ex-stage music, Remilia's theme)
3. SA (Yuugi just REALLY stands out, and I like her music. Okuu stands out as another I like for some darned reason. Probably a youtube video I saw.)
4. MoF (Kero kero kero kero kero kero kero!)
5. IN (Wriggle! I love Wriggle. Also some very nice music there, and Yuyo... ghost lady can lead to fun fanworks.
6. Whatever game first features Mima. Reincarnation in it's original PC-98 or ZUN's remix are both enchanting.
7. Whatever game first features Yuuka. A flower youkai that's considered among the most powerful? Charming in some way. A shame she's shown as being a one woman encyclopedia of brutality.
8. StB (I am just not good at this. =< )
9. UFO (Only just learning about this via Wikia.)
That sums me up. I know, I'm a newbie and lame because of lack of experience.