It would surely be a repetitive way to live, for doesn't a little misery go a long way to adding some variety to an otherwise tedious life.
And who wants to be Pollyanna anyway, constantly finding joy in everything you see, a positive where others see a negative. A little joy mingled with misery can only enhance our ability to appreciate the good in life. For if we are permanently happy - we can never convey our joy when we've known what it is to be utterly miserable.
I cannot bear people who are permanently happy.
I prefer to be miserable and happy in equal parts..on a rota basis.
So I can appreciate both all the more. To wallow in both emotions leads to an appreciation of the various mental states.