I have a Magimix & use it to make:
Dough - bread, chapatti, naan, pitta, focaccia, French bread, pizza
Cakes - cupcakes, fruit cakes, tray bakes, Victoria sponge, carrot cake, banana bread, courgette cake, lemon drizzle, gingerbread, cheesecakes
Pastry for quiches, tarts, pies
Meringues & Pavlovas
Whipping cream, buttercream
Coleslaw, shredding lettuce, chopping onions, salsa, hummus, pesto, slicing salads, cucumber, tomatoes, dicing potatoes & carrots & other veg (mirepoix)
Slicing bananas for banoffee pie, carrots, lemons, etc
Grating cheese & Parmesan (have special Parmesan & chocolate grating disc)
Crumble mix
Sausage meat mix - breadcrumbs, onion, meat, herbs, spices
Mayonnaise & dressings
Ice cream
Smoothies & cocktails, Lemonade
Crushing ice
Juice & coulis (have a juicing attachment) for topping cheesecakes or desserts
In fact pretty much everything! I have it out all the time and have an extra set of bowls so don't have to constantly wash up.
I plan my prep so that I don't have to wash up too much in between.
Eg I'll make Mayo in small bowl first then shred cabbage into large bowl then grate carrots & onion on top, mix with mayo.
I grate a block of cheese, use some, put some in fridge & freeze rest in portion size bags. Same with onions, chop a load (actually I use the dicing attachment to get even size pieces) use some, freeze some.
Crumble mix - make big batch, use some freeze rest
Pancake batter, Yorkshire pudding batter, crumpet batter, pakora batter
Dosa/idli batter
Herbs, chop a load & freeze
Bread dough, make a big batch, bake some freeze rest.
So I can whip stuff out of freezer and quickly prepare a meal.
I keep crusts and any leftover bread in bag in freezer & blitz into breadcrumbs when I need it or if I have loads of bread leftover, I'll make breadcrumbs & freeze.
Choc hazelnut mousse - whip cream till soft peaks then warm a jar of Nutella in microwave or in pan of hot water, so that it starts to go runny (not too much as will be too hot) & add to cream and pulse until just mixed in. Spoon into serving glasses. I sometimes put in a few raspberries. Chill in fridge. Yummy!
Just a few of the things I use mine for. 
I'd be lost without it! 