Now before you go "Play the game more" or "You haven't tried everything", let me preface this with this: I have every Discipline at 32 or higher, so I have a large portion of the cross class skills.

The cross-class skills that we're given are either not that useful, or redundant and some classes come out far better than others. For example (Since this is my main class) Paladins receive the following from their tertiary classes: Foresight, Skull Sunder, Bloodbath, Fracture, Mercy Stroke, Resurrection, Cure, Protect, and Stoneskin. Of those the only ones that cross class specifically for Paladins are: none. That's right, you get nothing extra special from being a paladin for either of those classes, and yes this happens a lot. You do get the Job skills which yes, they're awesome but you only get one every five levels of advancement and yes, you get a huge stat bonus increase.