Food for thought, the strongest of the solipism theories is where you firmly believe no other being/mind/existence/reality other than your own exists
http://en.wikipedia.org/wiki/Metaphysical_solipsism
And this is the bit I love about it, the reason why it's not a commonly expressed theory:
"One reason for the lack of support of this philosophical position is how strange it would be for a solipsist to preach solipsism - as if to convince everyone around them that they are purely a figment of the author's own imagination. The very idea of communicating philosophical ideas would be arbitrary to a true solipsist, as according to them, there is no other mind with whom they would communicate their beliefs."
I'm pretty sure you'd get committed if you truly believed everyone was a figment of your imagination.
The scary thing is that it's impossible to prove to anyone otherwise!