The more you do your homework, the more you're free to be intuitive. But you've got to put the work in.
What has always been most interesting about acting to me personally is that it affords you the chance to shift gears, both in terms of the experiences you get to have through doing it, but also the different kinds of things you get to represent.
There's a lot of romanticisation of the intuitive actor and method acting and all kinds of notions about getting inside a character and coming out from there.