I don't really mind people like that... In your example he's just sticking up for himself, lol... If you love the job you play, that's good~ If you talk that way, it just shows you're having fun with it. It's not like he's saying "every other job is useless, except for mine." he's just saying "myself, and the other people who decided to level this job, are..." y'know?
Where you said "Guess what... nobody gives a shit. You aren't special... deal with it!" Yeah, okay >.>; I think the whole "we PLDs blah blah blah" thing is more showing the attitude of that player, who happens to be proud. Saying "nobody gives a shit" is just crazy, lol -__- Don't you have certain people who play certain jobs on your friendslist that play their jobs really well and you respect them, and their attitude toward their job? It's like saying "You're not different from the next WAR, you all have the same gear, play the same way, talk the same way, etc."
Look at your sig, dude... "Taking meat shield to the next level since 2004" It's subtle, but you're basically saying a similar thing to the whole "us PLDs" but you're saying "I'm better than THOSE PLDs" implying that you, yourself, are a special PLD. But you just said to everyone else "You play the same job, you're not special."
Think about it for a few. ;\