Fishin'? Who's got time for stopping and doing something fun?
All sarcasm aside, I think it would be fun to fish if it was practical. But then, I'm a stop and smell the roses guy who has feet that won't go more than 300 miles at a time, so I will not have the opportunity to experience that thru hike "impetus" to max out them miles.
Sometimes I think that slowing down once in a while and enjoying a pleasant diversion that presents itself is a good thing. I spent an hour at McAfee knob when I came to it. In the meantime several thru-hikers blew right through there without so much as catching a glimpse.