[zzo38computer]

> If you build a Barbarian that can't deal damage, or a Wizard who's spells never land, you're letting the rest of your team down.

Such things seems excessive; a suboptimal choice probably would not mean that you cannot cast spells at all if your character is a spell caster, but you shouldn't need to be a spell caster if you do not want to.

There is the things you can do regardless of race/species/class/etc, anyways. In my experience, many of these things are significant to the story (I had done such things more often than class powers, actually).