What would your ideal text adventure game contain?

I like stories where I have power, super powers magic, loads of henchman possibly all of the above
a in depth world I like to have a feel for the world and I like to have my questions answered ( example why if this world have mad scientists is the world not hundreds of years ahead technology wise)
the chances to be Evil! Mwahahaha!!! but not too evil invade the kingdom and marry the princess evil not send her to the torture chamber evil.