For me, it's a long road but I'll make it short.
I guess I've always been into mysticism. Plus I loved playing cards too very much when I was a child.
The evolution towards today started from music - as a pre-teenager I was very much into Madonna and got interested in Catholism.. then, almost 20 years ago, came another strong woman figure with her music; Tori Amos. Now Tori is very much into symbolism, mysticism, mythology and such. By her music and interviews I learned about Carl Jung, but didn't bother to find out more until about six years ago.
And boom! A whole new world opened to me... From Jung's archetypes I went to study Joseph Campbell, started seeing the universal pattern in different philosophies and religious systems.
That lead me to Tarot very naturally. The major Arcana can be seen as a collection of archetypes of the mankind and whole universe, so to me it's a very big deal, very big.