Ever17 had good characters, a pretty exciting plot, but the twist wasn't too cool.
Remember11 is better than Ever17. The ending wasn't so bad either.
G-Senjou's last chapter was too drawn out. Looseboy's (or the TLer's) prose drags out every scene for too long, but I really felt it in the last chapter.
Umineko's EP8 was perfectly fine. (A slight exaggeration, but it was cool.)