Favorite Spaghetti Sauce?

I have always wondered about vodka sauce.  Is it proper to add ingredients as you would with most spaghetti sauce?  I always doctor up a marinara with ground meat (usually beef and/or pork).  And does it have to be served with penne or can you put it on spaghetti?  I am interested to know what are its best uses. To answer the OQ, I think I like Ragu Garden Vegetable the best.