my legs could get pretty hairy even before hrt, i shave mine though just cause the girlfriend likes it better (shes not big into hairy guys), but its personal preference if you want to shave or not, I don't think shaving it would really do much though, I don't really get the masculine pattern?, cis guys have different hair patterns on their legs, some are really hairy, others aren't, some are patchy, some aren't, just depends on the person