Yep, I, too often/mostly use PrtScn to Paint. But, where that is good for full screen shots, Snipping Tool is great for a section (of text or something specific.
Oh & Ted,
Put a CPU gauge, like the All CPU Meter (gadget) not, the silly thing that is in the default Gadgets offering on the Desktop in a dual-boot set up w/ 7 & 8. Go back & forth between the 2 OSs, do the same sort of tasks & activities on each. You will see the resource usage is significantly & substantially lower in 8 than, 7.
Cheers,
Drew