A good guide for the beginner who wishes to try and make their own juice.
I have DIY'ed since very early on, if memory serves correctly literally weeks into owning my first 'real' mod.
I actually like most of my juice fresh, before a steep(which actually isn't happening as that requires a solid and a liquid, the word has just come into common use but is an error), I find flavours to be stronger around this time with only a few flavours that I actually prefer steeped. This is good for me as I can use my juice immediately.
I recommend everyone who is going to DIY, to try steeping and also fresh juice- make some and allow to steep, then when it is ready make up some fresh, this will allow you to tell which you prefer.
It is mainly to do with our sense of smell, and during steeping certain smells become less harsh for lack of a better word, which leads to a slightly different flavour, which you may or may not prefer.
EDIT: Some information on 'steeping' which may help newer DIY'ers. This is an old article in relation to cartridges, but still stands the same-
http://www.whitecloudelectroniccigarettes.com/blog/e-liquid-steeping-myth/ .
Before people jump over that, I am not saying if you enjoy your juice steeped/ not steeped you are doing it wrong by any means, just that people should not think that they absolutely have to steep their juice.