Glad ye came to th' Pub, Tiny. Tis no better place ye could venture upon. Many here I'm sure could offer many answers.
Tis a general, wide-ranged question.
Could be hope, want, or desire for something better, the call of adventure, our own point of view, replicate what we saw from a movie or tv show, The joy of impersonating history to teach and learn, the mystery of something found that was once lost...
It's a large number of possibilities, all with so many different answers from every single person. :)
~Lady B