First visual novel I've ever played is Katawa Shoujo Act 1 when they first came out a few years back. I was really impressed by it. Then I started getting fate/Stay Night. Then Tsukihime, and the rest is history.
Yes, when they eventually add images for signature, there is a need for max size limit. My suggestion would be 400x200 pix and 1mb or whichever is smaller.
Yeah, why not? I'm pretty sure there's quite a lot of people prefers torrent than DDL. Just need a constant seeders or else it will be dead quite fast.
EDIT: Oh yeah I forgot about what happened to hongfire. Maybe it's not a good idea after all. o_O
Graphic section. Wallpapers, signatures, drawing arts, digital arts, and stuffs.
Also, Void section (Where people have small talks, forum games and stuffs.)