To be wildly enthusiastic, or deadly serious – both are wrong. Both pass. One must keep ever present a sense of humor.
Some emotional reserve is necessary, but I feel that emotions are okay and should be expressed and felt organically. Perhaps I’m projecting here – my standpoint is that of a person who is already emotionally reserved…I don’t know, being able to laugh at yourself is important.
Just don’t overdo laughing at yourself and get numb and detached from your emotions.