I'd like to know why dungeons have become less enjoyable. Or why you think you suck or why you are trying to enjoy them better. Is it a little confusion on the rotation you should be using? Is it the way other people are acting? Is it a perhaps long wait time to enter a dungeon? Perhaps a better hotbar / crossbar layout? Hate the Disco Ball effect especially when you ramp up to speed? (Ok that last one was a bad dig)
Like Dust Bunny said there is a skill later that lets you use skills "out of order". So your rotation will depend on what you currently have available, not what a level 50 (or if there is an updated one for level 60) rotation says. And it could depend on the situation. You can remove an enemy buff, silence, stun, DoT, AOE, etc. Be fluid, have fun, experiment, remember your side / rear attack bonuses, and find something that works for you!