It seems quite strange to me (juding by Facebook at least) how many people I went to school with still seem to meet up quite a lot (and many cases seem their prime group of friends seems to be people from school).
On the other hand I still see some people once a year (if that!), am only really in touch with 2 people from my university days and my friends pretty much entirely consist of people I met in London.
Obviously moving towns makes a huge difference (tho' I know people who moved to London but still spend much of their time back in Bristol or hanging out with others from school who are now in London)
a) Am I strange for not keeping in touch?
b) Are they strange for not moving on more than they have?
c) Is no-one strange and everyone just does things their own way?