No Ten Desires situation. I hated it. As much as I'm getting a taste for the game again, I don't want a game with an easy Easy and Normal Mode, a Difficult for All the Wrong Reasons Extra Stage (Harder Extra Stage with lower potential resources), and an obscenely hard Lunatic mode that makes the graphing for y=x3x look flatter than paper in terms of difficulty curve.
No more characters made to reference media (Sakuya is the only exception because Dio Brando is the best character from JJBA ever).
No more "OH I'M A BOSS' SHUT-IN OF A YOUNGER SIBLING THAT'S EXPONENTIALLY MORE POWERFUL THAN THEM" Extra Stages. I liked EoSD Extra and SA Extra but if I see one more of those situations, I'm going to stand on top of my house and scream "Junya Oota is running out of ideas".
No more bullets made specifically to blend in with the background and kill your resources without you noticing that they're there (I.E. MS Stage 2's random rocks out of nowhere that are the same color as the stars racing by in the background).
A character getting killed off, especially a staple character in the series like Reimu or Marisa.
A character brought back only to appease the fans.
Story of Eastern Wonderland gameplay.
Characters having intimate (Not necessarily sexual) relationships, like the MariAri or MariPatchy pairs that the fans have been egging on. Need I mention the EllYuuka pair from Touhou Mother?
I'm sick of games that highly involve dead things as a primary. In SA you went down to hell, in UFO you went to Makai, which has dead spirits, not to mention an undead Buddhist black mage, and TD has you spending the entire game in the netherworld region, going from Yuyuko Saigyouji (FUUUUUUUUUUUUUUUUUUUUUUUUUUU) to Myouren Temple (KYOUKOOOOOOOOOO) to a graveyard with spirits and zombies, a Hermit whose main attacks are based on the last stage's boss which was a zombie, to a burial palace with an awoken spirit that was resting for 1500 years, which had a ghost midboss hahahahahahaha this is so original, to an undead prince who can hear multiple voices, blah blah blah, Shoutoku reference, blah blah blah.
Christianity and/or Judaism brought into Touhou. I liked the wide variety of characters due to a highly varying set of religions with lots of ideas to be made. Jehovah-inspired will simply be a dumb idea to be honest because they only have the idea of one supreme god, which to be honest is a boring idea to put in a game.
Forced tutorial gameplay.
Having to play through the game with every character to unlock the spells for practice for everybody.
Gameplay totals (Stages 1-6), in means of "I'm not timing out a thing", to be more than 40 minutes.