types of visa:

family visit visa
tourist visa
business visa
other visa represents your job ex: engineer visa, laborer visa etc etc.

there is no personal visit visa. either that personal visit visa that you are referring represents the family visit visa, tourist visa or business visa...

for family visit visa- 6 months maximum stay.
for tourist visa- 15 days to 1 month
for business visa- 1 month to 3 months...