You have a good sense of humor.
你真幽默。(别人讲笑话不管好笑不好笑，都用这句。)
Your Chinese is really surprising!
你的中文令人惊讶!(用来鼓励说汉语的老外。)
You have a very successful business.
你的事业很成功。(现代人喜欢听!)
Your are very professional.
你非常专业。(他会更认真!)
Your are so smart.
你非常聪明。(谁都愿意听!)