Reply to Basic basic mixing question

So I've been practising for a while now and I'm slowly getting there, but I decided to read up on a few books to improve my knowledge on mixing and the like. Up until now I've been using the channel faders to mix and pretty much leaving the cross fader dead centre which is a way I was originally shown, but reading another book it suggests leaving the channel faders at 3/4 (to allow for volume adjustment, it does say this is optional though) and using the cross fader to bring the next track in.
I assume both are acceptable methods but wondering if there is any reason to prefer one over the other? I'm sure I've seen top DJ's using the channel faders more.

I'm on an S2 if only having 2 channels has anything to do with it.