How's the Learning Curve?Easy or hard?

PoE isn't really complicated, it's just relatively deep. Granted, it is the kind of game that's geared toward the type of audience who loves stats and numbers. Which is a rare thing these days with most developers choosing to simplify their systems to the extreme in an effort to appeal to the instantly-gratified console generation (No intended slight against you console gamers, that's just how it is.)

If you don't want to bother with numbers and stats, you can definitely still enjoy this game. There are fully developed build guides available, and even if you completely gimp a character they're still generally playable.

But it's the level of available customization that really makes this game shine.