I've always found
this article - on the natural feeding habits of the fish we keep in the wild, contrasted with typical aquarium husbandry practices - to be quite interesting.
I've also found
copps' tank of the month profile interesting; he's a big believer (and has had great success) in keeping angels and other borderline reef-safe fish in reef settings, and feeding seems to be a big part of that.
There's also this quite cool
experimental study on damselfish, where scientists fed damselfish pairs either once a day, two out of three days (low quantity diet), or every day twice a day (high quantity diet). Food used in this study was a combo of commercially available flakes & pellets.
They found that the low quantity diet was the minimum needed to reproduce, while the high quantity diet was the amount needed to enhance adult condition. Condition was measured by length & weight of the adult fish after six weeks on the diet. Parent fish fed a high quantity diet (twice a day every day) were bigger and longer than the fish fed once a day, two out of three days. They laid more eggs (and bigger eggs), and reproduced earlier and more often. Their babies were larger at hatching and more likely to survive. So yes, amount of feeding absolutely can make a difference to fish' health and condition.