Again no "Space Seed" on the list. This again supports the idea that Harve Bennett just picked an episode he thought could have a sequel rather than choosing a "fan favourite."
According to articles of the day (I became an avid fan of TOS via TMP and TAS, so followed the making of ST II closely), it was never mentioned as a "fan favourite", but because it was a solid episode that seemed ripe for a sequel.
"Shore Leave" often appeared on those early lists because it was an outdoors episode. Lots of comedy and drama, but some stunning, colourful cinematography for color TV in the old "Africa, USA" recreational area.