We have three computers, two desktops and one netbook... the netbook and the older desktop are both on XP the newer desktop is on Vista... I for one have no intentions whatsoever of further lining the pockets of M/Soft by 'upgrading' to anything else.
Similarly, we use M/Soft Office Home and Student Edition 2003 on all three machines and are quite happy with its capabilities. If documents in the .doc format have been successfully used for so many years why do we suddenly need .docx? Its just change for change sake...
Firefox is my browser of choice, but it used to be so much better when at v3.16 after which it just got heavier and heavier with incompatibilities with other programs introduced at every upgrade...
AVG Antivirus... again, used to be good, but like FF got heavier and heavier slowing down everything. We gave it up as a bad job three years ago and went over to Avast.
Like they say... IF IT AIN'T BROKE, DON'T FIX IT!