The typically perceived drawback to the major core classes, and REAL drawback to each.
BARBARIAN:
* Perceived: A warrior who isn't skilled (lack of feats), and is lightly armored that deals and takes punishment.
* Real: A guided missile on legs that if it doesn't kill the enemy, it will take enough damage that ending its rage will kill it.
BARD:
* Perceived: Jack of all trades, master of none.
* Real: You guys do your things, I'll just stand in the shadows and help you look cool.
CLERIC:
* Perceived: Spells focused on defense, so that the cleric can buff and fight as needed.
* Real: Ok, who needs healing THIS round?
DRUID
* Perceived: Awesome natural powers held back by neutral ethic and limited armor.
* Real: Ok, who needs healing THIS round?
FIGHTER:
* Perceived: I'm the best pure warrior and tank, but I have no special features beyond feats.
* Real: I'm out damaged by the bbn, out tanked by the paladin, and all I can do is roll to hit each round.
Monk:
* Perceived: I'm a lightly armed skirmisher capable of delivering terrible blows, but relatively easy to hit.
* Real: Flurry of Misses
Paladin:
* Perceived: Holy knight bound by a moral code, but gets divine powers.
* Real: I'm not sure my code will allow me to do this, so you better find some way of convincing/fooling me or do it without me.
Ranger:
* Perceived: Lightly armed skirmisher and survivalist who is not a front line fighter.
* Real: Paint a bullseye on your chest, since light-armor + d8 equals easy target.
Rogue:
* Perceived; Not a great combatant nor a caster, but I got mad skillz!
* Real: Another undead attack? I'll sit back here and watch guys.
Sorcerer:
* Perceived: I know few spells, but I can cast them all day long!
* Real: No, I don't know that spell. Or that one. Or that one either.
Wizard:
* Perceived: I have fewer spells, but I can learn them all!
* Real: No, I don't have that spell memorized. Or that one. Or that one either.
Of course each class has a weak spot, but many of them AREN'T the ones the designer assumed they were...