I love Froakie too I love Foxes but im not super keen on Fennec Foxes personally (not my fav type of Fox) and I love Frogs too and feel Froakies going to evolve into something awesome
Heres how it is for me right now
Chespin(Unless Chespin evolves into something really awesome he'll be the Tepig of this Gen for me I like him but I like the other two more)
I think Rock or Fighting would work well for Chespin Steel too I get a very Warriorish feeling from him
Fennekin I know Rock would probably be bad for Fennekin but I could see it as Rock or Flying and yes even Psychic but I refuse to acknowledge Fairy Type as a Type until its confirmed I still think Fennekin might go with a Arabic/Egyption theme
Froakie seems like either it'd be Fighting, Flying, Ice, or Electric he doesn't really envok a Dark look he looks like a Gentlemen Boxer or a Fighter of some kind but he coud become a Wizard but that would be so... ironic I guess
You could say the foam on his back resembles a swag bag, and would develop through evolutions, meaning he could be a dark type thief-based pokemon?