okay... well done on another successful picking
It depends what you wish to gain out of picking locks - if you wish to gain full feeling and pick it like a surgeon would work then single-pin-picking is for you.
If you wish to simplt open the lock then raking is more for you. Raking comes under some difficulty when more advanced locks are encountered, and although it is possible still to rake these single-pin-picking is generaly prefered.
This is not to say that neither of these ways is better, it's all a matter or personal preference.
BTW... If you are interested still regarding the inner-workings of a tubular lock look out for a post I will make soon regading them.
Also! Please don't pick locks you don't own... I picked the lock on my front door and it stopped working - when your parents come home and see you've buggered up their lock they won't be overly happy.