spaghetti alla carbonara--maybe my favorite pasta dish--this particular recipe link gives lots of history. tips from many chefs and has a great. detailed walk-through on technique so you don't end up with scrambled eggs and spaghetti! :-)
Spaghetti with olive oil, garlic, and chili pepper flakes- Ridiculously easy for a weeknight. Cooked pasta in chicken broth, decreased amount of chili flakes for the kiddies, omitted the parsley. Definitely making again and again.