Now that I am in the guard and off of active duty I actually have a VERY hard time calling my officers by their first name... which is what they want. My OIC pulled me aside one day and asked me if I didn't like him because I always called him either "Captain" or "Sir" and not Mark. I just chuckled and said "No sir... in fact I like you quite a bit and respect you even more. I'm not comfortable calling you Mark because to me that is a show of disrespect. I have no problem with you calling me by my first name. But don't expect me to reciprocate." I then told him that when not at drill and not in uniform, if we're at a social gathering then I'll "work" on calling him Mark.
Guess that's just the two different mentalities- him being guard his whole career and me being active for the vast majority of mine.
To that note I actually like saluting. Call me weird.