The problem is much of your ter'angreal do not exist in WoT so fans like me would not like to see something we do not see in books (eg. LoS inhening ter'angreal).

Well one traits you can add. Been trough doorway. Or been in finnland, and that person could have bonus to command and influence or one of them. And as negative effect he could hate or be afraid of some faction(eg. Aes Sedai).