Well, I know I have SAD. I grew up just north of the Equatoral Line!!!!!!! The sun rose and set withint the same 35 minute span every day 365 days a year! We first moved to TX and I had it there, now we're further north in VA and I've got it here.
I have an extremely hard time with the sun rising late and setting early. I never had a watch, I cooked dinner when the sun was at a certain point. I'd wake up and now by the sun light that it was time to get up, I did have an alarm clock to get up with though, so days with rainy season the sun would be gone and the day would start out gloomy. Imagine what it is like in our house -- summer time dinner is forgotten until it is too late simply b/c it never occurred to me that the hours were passing and the sun was still high and winter it's too early to cook when the sun sets so I then forget again. I've gotten better over the last 5 years, but it's hard to break 20 + years of habit.
Yeah, I don't like the cold, but it beats the allergies I have in the summer/fall. The gloominess gets to me the most -- yesterday, rain all day! There is rain the on vehicles now, I wonder if the sun will shine today at all.
When you grow up without 4 seasons, the seasons are pretty nifty to watch. But I also grew up where the climate was a constant temperature and you didn't have to decide to bring the jacket or not, wear long or short sleeves, sneakers or sandles -- running late and then stepping outside to find it's cold is frustrating, everyone has to stop, drop what they have and get a jacket, the pick up what they were bringing out and start again and it's 10 minutes plus with little kids who all need mom to do it for them.
The inconsistency of sun light truly is my biggest issue, I can deal with the cold if the sun would just rise and set on a consistent basis, my days are all screwed up when it does not. I've been in the US for 8 years now and I still have issues.