AAQ – here i was thinking that my honorifics were clear..
I often don’t capitalize names of gedolei hador and my own rebbeim. I used to not capitalize Hashem until reb e convinced me to.
I use rabbi for people who either are run-of-the-mill shul rabbis, speakers, community figures, etc..or controversial rabbis who were big in learning, like rabbi hershel shechter, rabbi kook, rabbi yoshe ber soloveitchik, etc.. because i don’t want to call them “rav”, since that term implies authority and authenticity, whereas rabbi is a general term which isn’t disrespectful, but shows a modicum of torah stature.
Z”l I don’t give much though into; i think i used it by rabbi twersky(here called such because he was a rabbi but not a posek, rosh yeshiva, or gadol batorah) because i was disagreeing with someone who did a lot of good for klal yisroel, and his memory is indeed a blessing.