Like most cool things, if you have to ask, you aren't cool enough to understand.
Put it this way - saying less than 80ppp is 'just fine' is like saying using an 800 x 600 CRT at 50hz is 'perfectly acceptable'![]()
I didn't know you could even do that...
Think I'll stick with the default anyway though.
This video says everything I want to say to you.