[@Lionhearted], I want a character who discovers an ability to sandbend that leads them to a sandbender heritage. Being from the desert undercuts the "my family lied to me" aspect. I could change something, but it's the only thing that I would like to have. Apparently it's too much for the GMs to give me one bit of leeway to build a really poor earthbender going on a character arc to find their true ability.

I know Toph was exceptional. But Player Characters in general are special. We have the head Fire Nation spy in Ba Sing Se and a Kyoshi Warrior in the game. Neither of them are mundane. They're exceptional, likely competent individuals. I've even proposed that my character be absolutely horrible at earthbending in general, just so I can have them discover and learn and grow on the direction of sandbending.

 We're talking about a complete klutz learning one narrow avenue of bending that they're actually half-decent in, then going to learn from the masters despite their parents' wishes. This is apparently too much for the RPG, and the GMs, to accept.