1. I don't like Mountain of Faith much aside from the music. I think Suwako is an uninteresting character, and I find Kanako a one-trick pony. I don't think VotWG is that impressive or interesting either, though it is difficult.
2. It took me a while to figure out where Zombie Reimu came from.
3. I find Youmu to be relatively easy compared to the Prismriver Sisters and even Alice on lunatic PCB
4. I find Alice to be far harder than Chen, and Chen relatively easy.
5. Yuyuko is easier than Prismrivers too.
6. Merlin Prismriver's first attack when playing Sakuya was always my archnemesis in PCB lunatic. That thing is harder than most spellcards, and takes more punishment.
7. I don't usually like playing for score. If I'm good enough at a difficulty level to be worried about scoring, I'd rather increase the difficulty instead. If I'm good enough to 1 cc lunatic and clear extra/lunatic, I usually switch games.
8. I like playing with 0 bombs a lot. It gives me the feeling that I can just focus on dodging, and not have to worry about dying with bombs left. Some of my best playing in regular runs has been with 0 bombs and nothing to lose. This is sadly mostly missing from SA and MoF due to the bomb system, though SA is still one of my favourite games.
9. I feel more relaxed when in practice mode though, and usually try to capture spellcards I would normally bomb.
10. I haven't read most endings in english. I have seen a lot of the endings, but didn't have translation patches back then. I've usually patched the games after I already stopped playing that game actively.
11. Most of my first 1 cc's had an incredibly stupid mistake in the first stages. Despite this, I tend to restart too often when I screw up early.
12. EosD is the second hardest of the games. MoF is the easiest (to 1 cc on different difficulties). This has a lot to do with game mechanics in both cases.
13. I have very little contact with the Touhou fandom, and get most of my impressions about the characters from the official games. I didn't know what Yukkuri is until a few days ago.
14. I couldn't figure out how to play UFO in full screen, so I changed my screen resolution to 1280x960 and played it in a window. Custom.exe has mysteriously stopped working in all of my Touhou games, even though it used to work just fine.
15. The X key is missing on my keyboard, so instead of bombing by pressing a button, I bomb by touching the surface under the button. I'm not sure if this is an advantage or a disadvantage, but I feel like it is the latter.