It's interesting to note that whereas Musashi has tried to
learn different weapons (staff, hallebard...) it was mainly
to integrate their techics in his (double) sword(s) mastery.
The moral is FOR ME :
- Learn different technics to enhance your ability, don't hesitate to adapt them
to your favourite way of acting...
As a programmer I take idioms/techniques from other language
(self-modifying code, closure, mixins...) and use them with my favourite language.
- If you have no other choice you'd better stick to the weapon you know better
(especially if you're more efficient with it than with the "said" adequate one...)
Don't get me wrong you SHOULD learn to use the adequate tool WHENEVER POSSIBLE...