Too much of a good stuff could be not so good, if it is monotonous. We have been having a stretch of incredible warm summer weather in the Pacific North-West, and I overheard one local man saying to another: “I hope it won’t turn into California.”
Granted, these people were both runners, and training outdoors is much more comfortable in cooler weather. Still, I think that this attitude shows that it is important to have variety in whatever we experience, even if things seem to be pretty good at the moment. At the very least, variation would make us appreciate the “ups” more and help cope with future “downs” by putting them into perspective.