My personal favorite was the early-90s Macs that didn’t have an eject button for the floppy drive, but did have a pushbutton power switch … directly above the floppy drive. It took me weeks to stop powering off the computer every time I wanted to eject the floppy. Silly me, not picking up on the oh-so-very-intuitive practice of dragging the floppy icon over to the trash can in order to eject it.
Also extra fun was if the computer was non-functional and had a floppy disk in it, since it required working software in order to eject the disk, you had to do some disassembly in order to retrieve the disk.