I for one do not use hibernation neither suspension at all
[snip]
The only machine I use Suspend on is a laptop running Windows, because (a) it's a laptop and has a built-in UPS should power go out, and (b) Windows nvidia drivers resume from suspend darn near 100% of the time for me. Sadly, my experience with Debian/Lenny has not been so, even with countless hours of research, tweaking, headache, loss of sleep, pain, tears,...and yes I realize it's mostly due to the drivers not being open. Sometimes the headache and tears are because we realize we have to accept a compromise.
I would never use Suspend on a desktop due to lack of battery/UPS present. As for Hibernate, it takes as long to do a fresh boot as a resume from Hibernate on my desktops so really there's not much point there.