We go the simple route especially when using a quality fresh pasta. Grape or cherry tomatoes, garlic, crushed red pepper, fresh basil....if I have some Italian sausage I'll start the sauce with that, otherwise just olive oil.
But one thing we started doing years ago was to finish our pasta with toasted bread crumbs and fine lemon zest. I 'toast' the bread crumbs in a dry skillet and hit it with the zest then throw it on top of the pasta.