1) How important are physical rewards to you?
Don't interest me too much, mainly because the few I have seen didn't post to Australia so I've always pledged to an amount that has no physical rewards.
2) Whose routes are you most looking forward to?
I'm interested to try them all, Kadan would probably be the one who interests me the most though, and then Aiden.
3) Is 1 year per route an acceptable wait time?
You've already had enough response to this regarding the overall time it would take to release all routes. I think that would scare away potential pledges. If art is the main concern with this there are artists out there that can adapt to other art styles, or at least be somewhat similar. The idea of having a different artist on their own route is a good one, because it'll lessen obvious differences. Personally, I wouldn't want to wait longer than six months, tops. Even then it would be pushing it if you're releasing as an entire route. Have you ever considered releasing it as chapters? If you release it with monthly updates, often it'll take a year to get through the route anyway, but it wont feel like as long wait due to the regular updates.