I will have to test software on lion, but I'll just dedicate a partition and drop into it when necessary.
The worst thing for me was Mission Control. I miss the proportionately-scaled windows of Tiger(?) Exposé, but I utterly refuse to completely disrupt my flow with the clusterfuck that is Mission Control. Re-fuse.
I'll freely admit that I'm on a Mac Pro in a sea of laptops, but I have work to do, and it's just easier in Snow Leopard than it is in Lion.
Snowpard will continue to work without being a liability for probably the next 12 months, at least.
Giving up on Lion isn't a moral failing. Give the pioneers some time to absorb the arrows. By next March, I'm betting that (suitably tuned) Lion won't be anywhere nearly as annoying as it is today.
My Mac Mini on Tiger is still seeing updates for iTunes, so Apple seem to be supporting older stuff at least partially.
Come to think of it, Leopard did frustrate me a lot. I think I just got really fat and happy on Snow Leopard, and now that rug has been ripped away from me.
Second, I think there's an implication here that prior releases of OS X have been great. They have not been great. Snow Leopard was solid, because that was its only goal. Much of what Apple has attempted with each release of OS X has been unsuccessful; remember when people were upset by Spotlight's mdimport grinding machines to a halt, or Filevault messing up home directories?
The reason these things don't stick in our head like Vista is that Mac OS X is a lot less important to Apple than Windows is to Microsoft. And Vista wasn't that bad! We just obsessed on the market's poor reaction to it. The market for the most part doesn't care about OS X.
I also like "OS X Kitten" as the next OS name. That, or they should switch to Pokemon.