I had to pick up this manga about three times before I truly got hooked, so the start may be a little bumpy if you don't have the patience. But after the first chapter the manga and becomes really easy to read since you start to understand the story that's beyond told. I sometimes found the battles a little boring, but skipping them doesn't usually affect the story unless there is dialogue involved.
Most of the humor is provided by Natsu's reckless behavior or Gray's exhibitionist nature that, though used a lot, never seem to get old. Other characters also join in, and once somebody causes havoc everybody feels the need to abandon their civilized side and have fun, much to the desperation of the Guild Master.