Tip for newbies: if you're involved in any new hot or oversaturated markets or business models mentioned here, it doesn't mean you have to quit. Same goes if you're considering it and your option is to try it and this thread makes you doubt and you'll end looking for a "perfect" business idea for another year.
As Felix Dennis wrote:
You can look at any market and say it's saturated in my opinion.
Everything seems to be flooded with people.
I don't think about saturation now, i just don't care.
Just move in the direction I want to go.