Yes 85% is as high as I wish to go too! (Pre LCHF, dark choc was definite migraine trigger so I treat with caution still...)
I mainly buy Lindt 85% and this can certainly be weird as it may vary from perfect to rather bitter from batch to batch. I've occasionally resorted to double checking the wrapper to ensure I've not accidentally got the 90% by mistake.
But
@copilost, if you want really weird IMO it has to be
chocolate avocado pots - I enjoy both individually but have my doubts about them in combination , though they appear to be quite popular! (They're on my maybe if I'm feeling extra adventurous recipes list...
)
Robbity