Finally a very good thread on ET.
Keep em coming boys.
Personal experience and opinion:
It takes about 2 years to learn the dynamics and that includes TA, some elements of FA (talking about traders and not investors).
Then it takes about 2 years more to wander around testing system and system, with your own money or on paper, fully focusing on the market.
Then, some of those systems seem to be much more comfortable to you than others, and then you start realizing that it's actually you... your own STYLE that counts and now you start focusing on the ones that really suit you.
You start thinking more about money management and trade management techniques rather than the actual setups and slowly, through the course of a trading year, you start doing things more or less intuitive, sticking with the simplest setups that don't give you any headache.
After about 4-5 years, you automatically become profitable as your mind is relaxed and you do the right things when in the trades, fully accepting the outcomes.
From here, it's all about keeping your line, researching emerging markets, types of instruments, other types of businesses that you can throw money at, etc