Ok if I may add to this there is lots of VN I haven't found any simdate games where there's some story but more choices bit like anime such as the world god only knows/ore no Imoto if someone may enlighten me with any dating ones,don't get me wrong Vn's are awesome.
well the only one i ever played that didn't suck (note: i have not played that many, in fact i've only played 3) is katawa shoujo...oh wait, you were asking for H-games, there are no H scenes in that one that i know of
Generally VNs by Leaf seem to be pretty good. I really enjoyed Wanko to kurasou, but if you don't like anthropomorphic characters I guess FSN. I'm GAR for Archer.
Favourite VN ever: Tsukihime
Mainly because of Mystic Eyes of Death Perception.
Most fappable VN ever: KanojoXKanojoXKanojo
Seriously, I fapped more than 10 times a day to this before. I remember my little guy getting swollen the next day and I have to go see a doctor because of it.
I haven't played/read many H-Games, mostly older stuff, but at the moment I'd say the Sono Hanabira series (although I only finished the first and I'm currently reading the second one).
Of the older stuff, I like Seasons of Sakura, Nocturnal Illusions and Knights of Xentar quite much (the last one was actually my first, even though I played a censored version back then).
Interface wise Majikoi wins hands down, it and Osanamiji are among my favorite light hearted VNs.
Swords and Magic: FSN and Princess Waltz (OST for both= epic win)
Overall: Galaxy Angel
Going to get Sengoku Rance eventually...one day...maybe.