I like Spag Bol (north-west England slang for Spaghetti Bolognese (sp?))
I probably dislike Chilli Con Carne (also sp?)
But when you add lots of cheese, I LOVE both meals. Cheese improves spag bol a lot, and CCC even more.
If my assumption is correct, both meals are not traditionaly served with much (or any) cheese.
Do you add cheese to your spag bol and CCC?
Would you like those meals without cheese?
Actually, both are traditionally served with cheese as a garnish, to taste.
Being 1/4 Sicilian and 3/4 American, I love both dishes. With lots of cheese.
On Spaghetti Bolognese, it’s gotta be Reggiano or Romano… fresh grated, and lots of it.
On Chili con Carne, I prefer sharp cheddar. Sharp enough to put your eye out. As well as a dab of sour cream and some diced onions.
Your problem is that you have never had Chili con Carne. All you have likely experienced is some watered-down, pansy-assed European version of God’s Own Food. 
I’m tempted to FedEx you a gallon next time I whomp up a batch of The Real Thing, but I think the EU frowns on the import of Foods of Mass Destruction.
But cheese is good on chili, as are onions and sour cream. Cheese makes a lot of things better.
Side question for our Professional Chefs: WTF is the difference between Bolognese and Marinera? 
IANAPC, but I will try to tackle this one. Bolognese is a red sauce that contains meat and red wine for flavoring (meat sauce). Marinara is also a red sauce but with out meat and a bit spicer.
You guys are forgetting the ultimate foodstuff, a meal in and of itself:
Frito Pie
Yessir, just take a bag of fritos, pour in some chili (with or without beans, I’ve always preferred with), some cheese (cheddar if you’ve got it, american if you absolutely have to), and some chopped onions. Grab a spoon. Eat.
At a ballpark, if at all possible.
Enjoy.
Most people in America put cheese on thein spaghetti (whatever type), however, too many Americans seem to think that little bits of crap in a green can constitute “cheese”. I’d rather go without if it’s not fresh grated.
As for the chili, it’s common as well. Personally, I like to take a baking dish, but the chili in, chop some onions on it, layer it with sharp cheddar and bake until the cheese just turns brown.
Forget the sour cream.