I had to reinstall the Cruz UI firmware yesterday, so I can't tell you what was in my ignore list before that. I'm working on setting this up again. I'll tell you what I've done and why. I hope it helps, but for right now, my own PDN isn't sleeping very well. It usually takes me a week of frustration to get it set to where it stays asleep about 95% of the times I hit that button.
Right now, my ignore list is this:
1. Task Manager and Alarm Clock -- these must be added by default because I didn't put them in there.
2. Android System -- If I kill this, the clock in the status bar stops updating.
3. Moon+ Reader -- I like to come back to a book where I left it, and this is my current favorite reader. Love the autoscroll.
4. Checkin Service, Settings Storage, Sync Feeds -- These are the ones that if I kill them, they immediately come back to life. I don't see any point in killing something the system insists must be running.
5. Settings and thumb keyboard -- These come back to life quickly, but not instantly all the time. They do seem to pop up when my screen comes back on, though, and I remember having to put the thumb keyboard in here after I first installed it on my old setup because it kept messing with sleep.
That's it, so far. I may add more things to it; I may even remove something in this list if I can't get sleep to settle down. For now, I'll probably concentrate on catching all of the processes that should be in the auto kill list. Although, I do manually hit the kill select button in the task manager before I hit the power button, so all running processes that aren't in the ignore list are dead before I put it to sleep.
ETA: I also uninstalled no lock because it interfered with sleep no matter what I did with it.
ETA 2: I had to turn off the Automatic Sync option, but left the background data transfer because the market needs that. Novel slept with no problem for the last 4 hours, but now, I'm going to read. I'm going to try to sleep it overnight with it plugged in. Hopefully, the little charging light will still be on in the morning.