1. I like it when there is only one, or maybe 2 at a time. That way it doesn't feel like you must choose between designs and such. 2. I think 5-7 days is perfect Onyx. It gives time for editing, but still keeps things moving so the thread won't grow stagnant.
Also, revamped my siggy for Ahz re-opening =3 (yes, I know I'm a bit late)
I have to agree with Bast. I like having 1 or 2 up, and 5 to 7 days for a round. Any longer and it seems to take forever, plus it can get overwhelming when there's more than two Ahz up at once.