Amatriciana is also my favourite...
My basic sugo is...
Saute finely chopped onion, carrots and garlic in evoo, when they are well cooked add some red wine and a bay leaf, let the wine get absorved. Then add the chopped ripe tomatoes and herbs (oregano, thyme, majioram, if you use a fresh basil add it at the end of cooking), salt and pepper and cook it to the prefered consistency. You can add some tomato puree if you like it thicker, and if ripe tomatoes are not available you can substitute them with the ones from a tin.
You can also add chopped bacon, crumbled sausage or lean mince if you like some meat in the sauce. (cook them with onion/carrot/garlic, if they have excess fat start by themselves and drain before you add the vegs)
I also like... when I am in the mood for something very rich and sinful, Quattro formaggi, 4 cheese sauce...
I like the combination of gorgonzola/taleggio/fontina/gouda or edam, I am not sure of the availability of taleggio outside italy, you can also use grated parmiggiano and/or emmenthar instead. Cut them in small cubes and heat them in a double boiler, add some cooking cream and milk, keep on cooking until it attains a smooth texture, stirring often. This is also wonderful mixed with steamed broccoli, you can enjoy it with potatoes as well...