1) Main Inquisitor (Human Male Mage) will definitely be wearing some armor. I like the new Mage apparel in Inquisition, but I always enjoy my main Mage character to have some nice armor. Not too thick or bulky. Something similar to the Rogue Inquisitor armor shown in the one of the demos of The Hinterlands.
2) ^ Same with my Female Qunari Mage. She may even wear thicker/bulkier armor on account of her size/intimidating presence.
3) Male Elf Mage will be sporting one of those really fashionable leather Mage coats. Perhaps one made of drakeskin 
4) Female Elf Mage will be wearing something reminiscent of her Dalish roots. Can't comment further considering we haven't seen the Dalish armors yet.
5) Female Human Rogue will be wearing something in the style of that --> the background image of this website. Looks very appropriate for the vision I have in my head.
6) Female Dwarf Rogue will be wearing light armor. Thick cloth/sturdy leather, perhaps with some metal plating or chainmail.
7) Male Elf Rogue will be proudly wearing medium armor; pointy and shiny, as piercing as his arrows/back-stabs.
8) Male Qunari Warrior will be wearing the thickest, meanest, sturdiest armor possible.
9) Male Dwarf Warrior will hopefully be wearing very heavy armor resembling fine Dwarven craft. The armor the Dwarf Warrior was wearing in the E3 demo was very good looking, I must say.
10) Male Human Warrior will be wearing something akin to the "commercial/canon" Inquisitor that we see in all the trailers. Huge, shiny armor, the dragon helm, and an appropriate broadsword to match.
11) Female Elf Warrior will be likely wearing Medium armor of Dalish craft. Haven't put much thought into this one, admittedly.