I voted every other day and also follow the fast day principle.
I think that compared to the sustanance they would receive in the wild, they receive more than enough.
Also i think its unnatural (then again so are aquariums) to feed them at the same time everyday so i tend to feed when i think it is suitable....
Without following a pre-prepared pattern.
I do, in contrast with this, make sure they get occasional vitamins, for health purposes.
Although this obviously depends on the fish.
My Otocinclus and Pleco get courgette/carrot daily due to me worrying that there isnt enough algae in their tank.