Welcome to SL, Kuraii!

Some gliders are just easier to tame than others. Hormones, previous experiences, genetic predisposition, cagemates, the age the glider was separated from the parents are some of the variables that make a difference in their ability to become friendly pets.
We have to always remember that this is a captive wild/exotic animal rather than a domestic one and we have to adjust our expectations for each of them.
"Patience" is always necessary and a relative term. Some will never enjoy our company but will succumb to the lure of a delicious treat while others become friendly little imps. Sometimes it takes a year or more for a glider to allow a human to touch it. That's an extreme situation but not unheard of.