I may be the only one here but I personally HATE custom stuff minus personal created characters for the roleplay. I mean like mobile suits from gundam, bending styles from Avatar, and or whatever the else be it. I like a precedent to point to and say, "this person did this and this therefore we can surmise that this is possible for a character at your level." custom stuff means there's no precedent and your depending on the person not to turn it into some OP ability or to use it to clear up a plot device or scenario that would have been hard to solve otherwise. Bash me all you'd like about snuffing out creativity. I like to point to things and say "This happened, This is the precedent in canon and what limits it imposes."