I first became familiar with Famke Janssen when she played in the horror movie, 'The Faculty' starring Josh Hartnett. My sister saw that movie 12 times in theaters because of Josh Hartnett. I went with her every time because of Famke Janssen. She played a bitchy teacher who gives the students a hard time, but once the alien slugs infect her brain she tries to seduce Josh Hartnett (so that she can infect him as well). All I remember thinking is, "bro, just do it. It'll be worth it."
When she was cast as Jean Grey a couple of years after that, I was very excited. I'd always seen myself as a Wolverine-type, so her playing Jean Grey would work well into my fantasy. I'll do you a favor and won't go any further into the specifics of my fantasies.