My lot love porridge, I think the key to good porridge is not the recipe but the technique. We use jumbo oats, add enough liquid for the porridge to be covered by the depth of a knuckle, like steamed rice, bring it to the boil without stirring, cover and leave for 20 minutes so it thickens up. (We have cast iron pans which keep the heat for a long time). It is both creamy and has bite that way. We use milk/ water in combination, depending what's in the fridge.
Having said that, our favourite recipe is probably dessicated coconut as about 1/3 of the volume, plus cinnamon, chopped dates and sunflower seeds ups the protein content and makes it sweeter without refined sugar. We usually have some dates soaking in the fridge as they soften and mix into everything more easily but well chopped dates do the job nearly as well. If we make it like this, we always stir everything in while the porridge is cold, because the oats break up too much IMO if you stir them while they are cooking.
Having said that we do do a lot of egg based breakfasts, and have made very thin pancakes out of just beaten egg in a pinch. Everyone always starts with fruit and sometimes I do a fruit salad with yoghurt, pollen grains, seeds and crispy buckwheat. I usually put in chopped avocado with the fruit, bumps up the fat content and is probably more filling as a result, though I've never tested that hypothesis.
On really good days with a full fridge and an easy morning we have a fruit and veg salad - grated carrot, courgette and chopped spinach with a grated apple, some nuts and a dressing of banana and orange/strawberry/ whatever's good and strong flavoured. Everything tastes of the smoothie but you get a nice texture and a plate full of veg, too. We'll have tahini or yoghurt as a topping for this.
We love love love bananas and tahini in this house. It's scrummy and means that you are getting some protein in with your fruit. We probably tend toward too much fruity stuff so I'm always trying to get something in with it to temper the full on fruit sugar hit.
We also love sardines and avocado on toast, very satisfying and we use the sardines with bones in as we aren't big milk drinkers so I have an eye on the calcium/ vit D problem.