Harem Hotel and Waifu Academy has a special place in my top list. Followed by Desert Stalker, SSP, Little Green Hill, Cozy Cafe, Eternum, and Radiant. There are tons more but i forgor most of their names.
I really hate sandbox games which are unnecessarily grindy. Also hate html with real porn, might as well make it full text without pictures and let the player run his imagination.
Hero's Harem Guild, I really liked the characters and had fun reading the story. Absolutely enjoyed it from start to finish. It takes a while to see some scenes since you need to progress their relationship first but hella worth it.