Here are some of mine, see my cross-post’s comments for more
Select and drag/drop text on Reddit while logged out (source)
www.reddit.com##+js(aeld, mousedown, isSelectionOutOfRange)
www.reddit.com##+js(aeld, mouseup, shouldShowButton)
Application spam on mobile (source)
! Reddit app ad
www.reddit.com##.XPromoPopupRpl
www.reddit.com##xpromo-new-app-selector
www.reddit.com##.bottom-bar, .XPromoBottomBar
www.reddit.com##.useApp,.TopNav__promoButton
www.reddit.com##body:style(pointer-events:auto!important;)
! uBO Annoyances has also this:
! https://github.com/uBlockOrigin/uAssets/issues/6826
reddit.com##.XPromoPopup
reddit.com##body.scroll-disabled:style(overflow: visible!important; position: static!important;)
reddit.com##.XPromoInFeed
amp.reddit.com##.AppSelectorModal__body
amp.reddit.com##.upsell_banner
www.reddit.com##xpromo-app-selector
www.reddit.com##body.scroll-is-blocked:style(overflow: visible!important; position: static!important;)
www.reddit.com##+js(aeld, touchmove)
www.reddit.com##.XPromoPopupRplNew
www.reddit.com##body[style*="pointer-events"]:style(pointer-events:auto!important;)
www.reddit.com##body[style*="overflow"]:style(overflow:auto!important;)
RPAN (source)
! Hide Reddit 'Top Broadcast Now' & 'Top livestream'
reddit.com##a[href^="/rpan/"] > h3:has-text(/Top (livestream|broadcast)/):upward(7)
Downloading (source)
! Block downloading. Please report back if does not work or causes issues
||strapi.reddit.com^$xhr,domain=reddit.com
Fandom
Block the autoplay videos on Fandom.com sites.
fandom.com##^#article-featured-video-container
Bunch of other fandom annoyances: https://letsblock.it/filters/fandom-cleanup
I have a couple that I found for youtube that block the cards on top of videos, and the little info things in the corners.
youtube.com##.html5-endscreen-contentyoutube.com##.html5-endscreenyoutube.com##.ytp-ce-elementannotations_module.js$script,domain=youtube.com/endscreen.js$script,domain=www.youtube.com