Our group that is just getting started as this as combinations so far:
Changeling Druid, a Kalashtar Soulknife, a Human Artificer with the Mark of Finding, and a Gnome Delver (my own class).
I created my own class because, although the ranger and rogue combination would fit my character concept, I would be getting class abilities that my character just wouldn't use or want. So, my Delver class is a combination of the Ranger, Rogue, Delver class (from Path of Shadows), and Scout (from Star Wars).
We have the bare concept down so far, but the Gnome is a wannabe Indiana Jones, the Human Artificer just wants to have his own business someday, and so far the other two are still making their characters.
I hope some of you don't mind me using some of your ideas for NPC's in my game, cuz many of your ideas are pretty cool.