Auto inject, when they work...
Many of them are not ejecting anymore due to a small gear disintegrating, i know that small gear is now 3d printed again.
Also, many of them are not reading properly anymore (mostly the 800 k) probably a head's trouble.
The 400 k is nice also, mainly because they produce that specific sound, i have been fooled by two of them not reading properly, then discovered they will not work without the floppy drive shroud/support (apparently the display is interfering with the drive otherwise)
Powerbook ones are nice also.
Manual-inject, i only have a few, not in computers anymore.