Firstly, sheath play is a double edged knife....mostly you want knife to be able to adjust to sitting/standing circumstances, extra/outer clothes, gear, etc.....a sheath nailed in one place is a royal pain, such as on old issue pistol belt, or some velcro combat gear.
Secondly, sheath placement on belt depends on your britches and where loops are located which limit where knife is placed....and something with which you experiment to find what placement works with what pants and with what activities.
Some combos turn out ideal, some are total duds. Sometimes same knife carried in front of hip, other times behind the hip, and work fantastic with THAT clothing and daily chores, but totally unworkable with other clothing.
You will appreciate adjustability which play gives when mounting/dismounting, and simply find what combos work for YOU.
On shorter blades with hangar sheaths, I like the option of tucking sheath in front left pocket to one degree or another....it certainly goes nowhere, then.
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Cadent a latere tuo mille, et decem millia a dextris tuis;
ad te autem non appropinquabit.