Even though the Virtue Flaw is up to the Storyteller, any reasonable ST will consult the player and pick a break that's within their comfort level. As others have said before me, discuss with your ST and maybe even the whole group. You might discover that others are also treading Limit breaks and approaching them communally will allow you to let go of the anxiety.

Not every Limit Break has to be Berserk Anger. The drama a Limit Break creates can also be personal. For example, our Dawn caste was diving into a lake of molten metal, when he triggered Crushing Doubt and the next scene...