I think perhaps the attitude you have with playing a job has some affect on how it feels to play. A DPS spirited player may not sit well in a job designed as a healer. I've never been interested in big damage output/numbers, and I've generally found it more suitable/enjoyable to play as healer. It's not like you can't change your temperament for playing a certain role either. A couple days ago I kind of changed my focus and the way I felt being white mage away from the DPS/pure-efficiency madness because I'm bored of it. So I relaxed out of it, and resolved more into living the job and feeling the environments and events, rather than using it as tool to abuse in order to reach somewhere (which is ultimately no where).