I started a few years ago playing vn on your list, and yersterday, I finished the list.
Tier 1
Symphonic Rain, Sharin no Kuni, Higurashi no Naku Koro Ni, Umineko no Naku Koro ni, Ever 17, Remember 11, Rewrite, Rose Gun Days, Little busters !, Clannad, Danganronpa.
I really recommend the vn of this list, especially Ever 17 (best vn I've done so far) and 07th expansion vn. You should watch the anime for Clannad, because it's really well done.
Tier 2
CHAOS; HEAD, Cross channel, G-Senjou no Maou, Majikoi, Swan Song, Kara no Shoujo, Hoshizora no Memoria, Katawa Shoujo (), Muv Luv Alternative, I/O, Deardrops, Higanbana, Ef
(I found MLA so overrated tho, but I don't really like action-oriented vn, so yeah)
Tier 3
Katahane, Planetarian, Narcissu, Comyu, Grisaia no Kajitsu
Tier 4
Sekien no Inganock, Eien no Aselia, Dysfunctional Systems, Kikokugai- The Cyber Slayer, Eden.
Shitty tier
Tsukihime : Characters are bad, music and art are horrible.
Fate/Stay night : Because it's so overrated, even more than muvluv and steins;gate.
Utawarumono
Ugly tier
Zanmatasei Demonbane, YU-NO : seriously, I find the art so outdated that I can't possibly enjoy these vn.
Only worth for the gameplay tier
Eien no Aselia, Sengoku Rance (ok for the sex too), Daibanchou.
Other vn that I can't talk about
Forest, Steins; Gate, Fault: Milestone (1 & 2), World End Economica, Hanachirasu, Ayakashibito.
You probably don't care at all about my point of view, but I wanted to give it anyway.