No like / kudos / ❤️, though I feel less strongly about that than I do about reblogging.

Would you feel better about like/kudos/❤️ if there was no counter?

e.g. I click ❤️ on your post or comment, and you get a notification (if you have notifications turned on for that feature) but my ❤️-ing your post is not visible to anyone else, and when you look at the comment/post there's a field you can unhide that shows you the usernames who ❤️-ed it, and maybe the icon changes for zero ❤️ versus one or more ❤️, but it doesn't say how many ❤️?

That way the "unobtrusive wordless support" functionality would still exist, but the "keeping score of how popular a post/comment is" functionality would be removed.