My most disliked blocker is the snowball. It completely hides all the cropsies and even if you make a move next to it you can only see the cropsies for that one move and then everything is covered again. Definitely not my favorite!
It's a really tough choice. I don't like frogs although they can be useful sometimes. Grumpy cropsies are so persistent and annoying. But my vote goes to snowballs, you can never get rid of them as they are always coming back.
I actually don't like the fireflies - I have a hard time coordinating between multiple ones to get rid of them, especially when a cascade happens and closes one of them up again.
Grumpy cropsie I would say because it really does annoy me when I see a good move but can’t do it because then the rest of them In that move will turn grumpy as well. It’s that or the snowball as the snowball is just pointless but the grumpy one is more annoying