Round to make it easy to get on and off I would assume.
Answered an earlier question about looking at world events cause I found it interesting.
The world is a lot smaller now then when I was in school. I have friends I talk with, send cards to, and have been invited to their wedding in Germany that I am closer to now due to the internet. I think the days of only following your own events without looking at what is happening elsewhere is long gone. Whether it is the problems with money in the US or Greece, the cruise ship accident, or the problems of production in Japan you need to keep a world eye now, not just a county, state, or country look.
Do you write out cards or notes to people, are you strictly digital where it is digital birthday cards, or do you feel it isn't necessary to keep in contact that way?