I am usually letting my (Lenovo, Win 7 Ultimate x64) laptop go to sleep after 15 mins, which is just perfect for me. With one exception:
Is there a tool or other tweak, that would prevent going to sleep if CPU load is consistently over 50% or download is above a certain amount of MB per minute? (that way, tiny "pings" and "downloads" would not prevent sleep, also serious up/downloading and (in my case:) image rendering would keep the machine awake until the job is done... then let it go to sleep.
Of course I can keep changing the power settings, but I am kinda lazy. And I am not keen on getting up at 3a.m. to tell my machine, that it's done and time to sleep. (Yes, various FTP and rendering tools have a shutdown-when-done option, but this is too specific for me)
Would be a darn useful feature (and add environmental friendlyness) for a not that small range of users, to have "additional sleep criteria", wouldn't it? And if M$ is not gonna do it, have a tool that simulates a click or mousemove to keep the computer awake as long as needed as a workaround.