Unless you've worn a ankle holster before, see if you can try one before buying one. They drive me NUTS! I regularly carry a P3AT in a DeSantis Nemesis pocket holster AND no one has ever "made me". That includes greeting a couple hundred people (church as a pastor) AND courthouse security (as an LEO). They DON"T show especially if you wear pleated pants. On the other hand, I've seen A LOT of ankle holsters print (do you have a tumor?) or be exposed when someone sat down or crossed their legs not thinking. Just my .02 but I think FRONT pocket carry is better. People are USED to seeing things in your pocket NOT on your leg.
HTH,
Mike