I've recently picked up this series after putting it off over and over again. I've just started the second season, but I've heard there's a point where a filler arc was introduced in order to give the manga a chance to get adequately ahead. I've not traditionally been a fan of filler in the past, so I now pose two questions. 1) Is the filler arc worth watching? and 2) What episodes comprise the filler? Basically, if I chose to skip over them, where would I stop watching and pick up again?