Tradeoffs do exist, but most forms of self-improvement really are just improvement, not tradeoff-adjustments, and assuming otherwise would cause you to miss opportunities. Beware of putting obstacles in the way of things you should do; deciding you need a creativity test before you work on improving your memory is more likely to drive you to inaction and loss of benefits than to lead to an actual test.
Tradeoffs do exist, but most forms of self-improvement really are just improvement, not tradeoff-adjustments, and assuming otherwise would cause you to miss opportunities. Beware of putting obstacles in the way of things you should do; deciding you need a creativity test before you work on improving your memory is more likely to drive you to inaction and loss of benefits than to lead to an actual test.