1. He has a passive disposition.
    他有被动的性格.

2. ----but only if you´re blessed with a sanguine disposition and won´t suffer sleepless nights over share prices.
    你必须性格开朗，不会因股票价格的浮动而夜不能眠。

3. I am a man with a cheerful disposition.
    我是个性情愉快的人。