No such thing as a natural sensitivity, moving a mouse is all learned behaviour and your "natural preference" is merely an expression of familiarity from a culmination of all the experiences you have had prior to that moment.
Also, games require different sensitivities. CS:GO players typically use lower sensitivity because they need to be very accurate for a small head hit box at long range to be the most competitive, Quake players use high sensitivities because they need to use complex movement and rocket jump around the map in order to play the most optimal meta.
There would be no point in being a CS player who used a 70cm/360, and then wanted to have try a playing Quake stubbornly insisting on maintaining that sensitivity as it's just not the most practical for that game. Use a sens that works for the game you want to play and the type of movements it requires.