I get angry to, but in my case until I start the transition I can't expect too much different since there is nothing to remind them and in regards to my job I have to deal with it and just swallow any anger I have. Kinda used to it by now though.
The people I know and know me pretty well all stick to the 'he, him, etc." which is great. Luckly strangers also say that 90% of the time until I say something.
Just takes patience. I know it can be annoying and fustrating, but in time things should balance out. Just hang in there and remember not everybody will understand and/or accept it. You will just have to take the high road and be the better person as much as possible.