I really think the context matters. If the person doesn't like the way you are playing and is trying to alienate you by using a title instead of your name, that is a bad thing. But I think it's more often the case that names are bit complicated and people would rather use the text they know is right "drg, "brd, whm" then struggle to figure out how to spell a name they might get wrong. Personally I would find someone misspelling my name to be more annoying than someone calling me "whm" or something. Usually I avoid this whole issue by only saying things that don't require a name, such as "Please use Flash more, thank you~" (obviously to the tank) or "Maybe turn off Cleric Stance?" (obviously to the heals). Saying people's names can also feel a little overly personal to me too sometimes... I don't know you, far be it for me to shorten your name to a nickname you might hate in the middle of a fight. Saying someone's name in certain contexts--like when you are trying to correct them on something--might seem more like a personal attack than just trying to tell someone to try something different as a blm or sch. Like someone said above, I personally like being called "healer" or "heals"--I feel like people are recognizing the important role I play in the party.

Oddly enough, I don't think I have been called by my job in a long time. Almost everyone in dungeons who needs to say something to me uses "Yehn," which I find cute--but maybe it would bug another person, especially anyone up on miqo'te naming conventions. It really varies from person to person, so when it doubt, I would take the easiest path.