I've lived without seasonal changes for I worked in the Persian Gulf for about fifteen years. So, by comparison, I enjoy the change of the seasons here. Of course it gets depressing when it's dark at 4:00 pm during winters. Then ever-so-slowly, spring triumphantly arrives and makes everything seem worthwhile.
People need a little down in order to enjoy a high. I've heard pharmaceutical anti-depressants do take the edge off the low points but at the sacrifice of those up moments. An unchanging plateau surely isn't any way to live.