I did start Emacs just now to only to do “C-x 8 FULL BLOCK <RET> C-a C-<SPC> C-e M-w”. xd
(Translation: To copy the „█“ character.)
I would love to have some pup-up Unicode character chooser, where I can look up characters by name, without fancy UI ballast. Just a text field and preview/search results.
(Maybe I will write such app at some point in time…)