I realize that lately I've been referring to people (doctors, pharmacists, customers, etc.) using the masculine gender (him, his, he, etc.).
I just want to note to all the politically correct police out there that I'm well aware there are plenty of women doctors and pharmacsts. However, it is really a big pain in the ass (and generally sounds pretty stupid) to write he/she, him/her, his/hers all the time instead of just picking one gender.
I don't know if this is correct, but I was taught in school (elementary school, I think) that if you are not referring to any person in particular, you should use masculine pronouns by default. Whether that's 100% correct or not doesn't matter because that's the way I'm going to do it. It just sounds better than saying him/her, and it definitely sounds better than using "them" or "their" when you only mean to refer to one person.
That is all.