I hate when the fluff description of a rule only applies if you optimized the way the writers expected you to.

For example: The tank warrior is a matter of melee combat and can dish out and take huge amounts of damage! (Unless you didn't roll an 18 for Muscles and you rolled below average for your Meat Points.) The sage is a master of magic and knowledge and knows a lot about everything (unless you didn't put a 20 in Brains, because the Sage class only gets 1 skill point because it's assumed you'll have that high Brains score for the bonus skill points).

They say things like "fighters are strong" but what they mean is "fighters suck unless they're strong, so you shouldn't play one unless you have high strength". The class descriptions are actually prescriptions, but they don't tell you that.