Of the VN and VN hybrids that I've played that are currently available on Steam, Long Live the Queen is the best of them. Dysfunctional Systems Ep.1 is a promising start but needs a little work that I'm confident will be accomplished with the next game. Heileen is sort of bad. Planet Stronghold is not good.
I've heard really great things about Cinders, though I haven't bought it yet. Go! Go! Nippon is supposed to be a decent introduction to the genre, still haven't played it yet. World End Economica is supposed to be good too. Cheery Tree High Comedy Club is supposed to be good too. The Analogue games have gotten a lot of praise.
Narcissu 1st and 2nd are free and supposed to be great. And filled with feels.
There's more coming out in the future too, like fault milestone 1.