I sometimes feed twice a day, and sometimes I forget to feed all together for a day or two. So I guess it all evens out. I feed either newlife spectrum small fish formula or omega one tropical flakes 1-2 times a day, but very small amounts. I drop hikari algae wafers (the kind made with spirulina) in every other night and on opposite evenings I feed hikari sinking wafers for bottom feeders. I randomly feed frozen blood worms and frozen brine shrimp.. like maybe once or twice a week. When I remeber to buy a zuchinni I will put a slice in overnight for my bn pleco and otos. I have frozen peas in the freezer and a few times a month I will nuke a couple in the microwave in a wet paper towel for a few seconds and then shell them. I too have gotten more lazy and random with my feeding schedule, but I suppose in nature it is the same.
I just went 3 days without feeding because I was sick and my water looks so crystal clear. Lol. I felt better today and did a water change, cleaned filters, and fed them a little bit. One of my angels actually bit my arm during the water change when I reached in to replant an uprooted plant! I guess he was hungry! Then he took the flakes right out of my fingers.