The process of any given artist is limited by the knowledge and methods he posseses at that time. It is also affected by the invironment and general lifestyle and mood.
ideas are not accidents but they might appear so if you are not aware of your own process. The ideas might seem to fall from the sky but in reality it is never like that.
Personally I am a thinker. I never start out by sketching. Actually I rarely sketch anything which is also my weakness. But I can think out most ideas in seconds. I like to watch a lot of anime and character driving shows when working on characters. Pump your brain to the limit and remember to think about the characters when you see them. Who are they, where do they come from etc etc.
The brain is a mighty tool once you learn how to utilize it. Sketching is great but there is more to design than just visuals.




