The mini-processor is ideal for small quantities since they never chop as well in the large processor. I guess I use it most frequently for mincing garlic. I must have the oven. It is great for baking 3 or 4 potatoes rather than heating the big oven. It also heats small amounts of hors d'ouevres.
Leftover pizza stays crisper than in the microwave.
It also has a broiler function which I used often when I lived alone. The choice is yours. Blenders - I have a blender. I never use it. I find that many things that can be done in the blender are more efficiently accomplished in the processor.