I basically have 3 'favorite' non-Key VN things, and the rest, I'll go through them one by one:
1: Type Moon
I started Tsukihime first and finished Arc's route, put it on hold for some reason after that. Ended up reading FSN then and loved it (for the record: Heavens Feel > Unlimited Blade Works > Fate), so I went back and continued Tsukihime after that.
Ciel's route was okay, and then I started the Far Side routes and those are what made Tsukihime for me, they were really damn great (Kohaku a best). After Tsukihime I read the PlusDisc and then Kagetsu Tohya. At that time the translation for Fate/Hollow Ataraxia wasn't finished, so I played Fate/Extra to kill some time (doesn't really count as VN, but hey). When the FHA tl was released I read it right away and it was great.
Now I'm waiting for the Tsukihime Remake, hoping that Nasu will eventually get off his lazy butt and stop playing Dark Souls and Bloodbourne all day, and for the tl of Mahoutsukai no Yoru.
As a side-note, I've watched Kara no Kyoukai, Fate/Zero, Fate/Prototype, half of DEEN's FSN and am watching UBW.
Not a lot to say here really, a friend recommended this to me and I read it (before the final tl patch was out), and I just enjoyed every bit of it. After finishing all the routes that were translated at that point, I read the translated parts of MajiKoi S, and then Sayaka's route in MajiKoi A-1, and later came back to the first VN and finished it when the final tl patch came out. Now the team that translated MajiKoi is working on S, and another team started translating A-1 with the goal of translating all the A's, and just 1 or 2 days ago those teams merged to Skyspear Translations, so here's hoping that all the MajiKoi's will be translated soon™
Top 5 girls in no particular order: Wanko, Miyako, Tsubame, Benkei, Momo
3: no Naku Koro ni
Haven't quite finished Umineko yet (Finished Ep4 yesterday, dat Dreamenddischarger scene, Ange a best), but so far it's awesome, and Higurashi was really great too. While reading Higurashi I even kinda recognized Ryukishi07's writing style from Lucia's route in Rewrite. Another funny thing I noticed is how the music is getting better with each game, so I'm expecting a lot from Umi Chiru here (which I will start in ~30min btw)
Those are my 3 favorite non-Key-Franchises for VNs, but I've read other stuff too, like G-Senjou no Maou, Katawa Shoujo, Hoshizora no Memoria and Grisaia no Kajitsu. Currently on-hold are Ever17, Katahane and Narcissu; after I finish Umineko I'll either continue one of them or read Ayakashibito. And once summer semester is over, I'll read Air like I promised in my introduction, and Kanon if I get to it :3