Throughout the campaigns my group has going now, and have planned to come up soon, quite a few characters (a monk, two wizards, two warlocks, and a fighter) utilize the versatile property of a weapon in some way. Only the fighter frequently changes between one-handed and two-handed usage, the rest usually only use the weapon two-handed and are using a versatile weapon rather than a two-handed weapon due to proficiency or size limitations (though one of the wizards is using a longsword rather than a greatsword while proficient with both because she has a magic longsword - she'll likely trade to a greatsword if she finds one that is at least as useful as her current favored sword).