I am one of those, that when starting a completely new weapon choice, likes starting a new character altogether (I use different Miis). After that, I tend to not use ANY other weapon on that character until I get him to G rank (solo).
I feel this makes me learn my new weapon much better than if I just give my main character the new weapon. I do eventually make those weapons for my main, but only after I feel like I am completely proficient on the weapon.
What does everyone else think on this issue? Should a player just jump into the new weapon whenever they want, or only when starting a new character?