My most memorable nights fishing last year was the night I ended up in the water to get a trout out of the reeds, it was badly tangled up, While I stood there dripping wet, with my arms stretched wide open( crucifixtion style) dealing with a tangle, a stag Roe deer came down to the bank opposite for a drink about 20 feet from me, I kept dead still as it looked me up and down and kept drinking.
The most memorable night the year before was having a couple of grass snakes swimming around and around me when i was wading.
Year before that having a blank night when the wind and rain got up to missery level no 9 and as i got to the car. from a solitary tree by the track in the howling wind I heard my first ever nightingale giving it the whole repetoir (unless you have heard one you just wouldnt understand).

Year before at the same spot Seeing a log floating down at dusk , which then had two smaller logs and turned out to be a family of otters playing in the pool just under the bridge i was stood on.
year before that while wading by some reeds hearing a monster from hell snorting away then the reeds going crazy and then parting right next to me and the striped nose of a badger sticking through to slurp up some water from the stream...... are you getting a pattern here?
Who cares if your in the 10% or the 90%, fishings just an excuse for messing about by a river.