Three things make a poll.

[andrewducker]

[Poll #1793665]

Comments

[strawberryfrog.livejournal.com]

Dark, cold evenings and SAD seem (personal anecdotal observation) to have a stronger effect on people raised in more sub-tropical latitudes - e.g. South Africa, Australia - where there is much less seasonal variation in day length.

The first few winters were really bad. After that it's not quite so bad.