My group has had two rounds of characters. 1st round was just starting out, 2nd round is now that they have a better grasp of the game and wanted to try different things out.
1st round:
Gnome Wizard (Evoker)
Mountain dwarf Bard (Valor)
Dragonborn Paladin (Oath of Vengeance)
2nd round:
Variant human Cleric (Tempest)
Tiefling Sorcerer (Wild Mage)
High elf Warlock (Blade/Great Old One)
The first player went from the Wizard to the Cleric (going heavy armor and 2Her with thunder/lightning powers) because he always plays Wizards and wanted to try something different. The second wasn't fond of the personality he made for his Bard, and wanted to mess with the Wild Mage as a sort of chaos-enchanter. The third mostly wanted to round the group out, and so went from being the frontliner/semi-healer to a mix of melee and ranged damage.
So far, they have all had great opportunities to flavor their characters how they wanted to. I also houseruled that people can reskin what a spell's damaging element is to whatever they want (rest of the spell's effects stay the same), which worked out well for the Cleric wanting to make his spells into more lightning-flavored things. The Wild Mage is going for a very chaotic enchanting/face guy, which will be interesting to see play out. The Warlock is going for a psionics feel (playing in Eberron) and felt that a Great Old One Warlock would capture that best.
Been a blast seeing them not only have options, but feel like they have options, which was something that they didn't quite get in Pathfinder with most of the classes.