Here are a few examples:
A Good Monk is constantly switching between back and flank to keep getting positional bonuses. A Bad Monk will go to either flank or back, and stay there.
A Good Monk keeps their 100% uptime buffs up(Twin Strikes, Dragon Kick, Greased Lightning) at all points where it is feasible to do so. A Bad Monk will forget or just fail to keep them up even when it's possible.
A Good Monk will level up Dragoon and Marauder(especially Dragoon) to acquire essential cross class skills. A Bad Monk will not.
A Good Monk will stay out of AOE. A Bad Monk will not.
A Good Monk tries to find the best times to use their utility moves, such as Stun, Silence, One Ilm Punch, and Mantra. A Bad Monk does not.
