I thought all has been said about DJing. I was wrong. This is the best article on DJing I have ever read: Things That Don’t Actually Make You A Better DJ | PassionateDJ.com.*
This just FYI: I grew up playing vinyl and switched directly from there to laptop — never had a CDJ phase. Today I play with a laptop, FLOW and Controller. If someone likes to think I’m not a real DJ (anymore), I suggest you give me 2 records, 2 turntables and a mixer, and I show you.