Share a favorite Spell Card, nonspell, or an entire stage that you guys are fond of throughout the games!
I'll go first:
Touhou Eiyashou is probably the Touhou game which I had the most exposure to and spent the most time on, so I'll start with it. For me Stage 4A was extremely enjoyable for me personally, facing against Reimu's gimmicky nonspells and Spell Cards. I especially like the nonspell where she zips across the screen while shooting a concentrated stream of bullets at the player, which include Yin-Yang Orbs that will only hit your human character as if to dissuade you from going high-speed to dodge the bullet streams.
Haven't played Youyoumu yet, but Yuyuko's "Perfect Ink-Black Cherry Blossoms" Spell Card is truly a dazzling one. I actually prefer it more than her impactful "Resurrection Butterfly" Spell Card.