So who makes constant updates on Facebook?

People who are constantly wanting to tell their freinds what they are upto, no doubt, but also:
a) having too much time and b) dont knowwhat to do with it?
c) are feeling insecure?
d) Feel comfortable giving hrly updates so because they love sharing ?
e) Love all their friends?
f) are largely E on the MBTI?
g) Love looking at pictures
h) love the idea of telling people stuff without actually having to talk to someone or seeing them in the eye?
i) Dont like shaking hands?
j) are looking for an easy way to attract attention?
k) all of the above?
l) none of the above?
m) Others?..