I drive the Toyota Prius-C, and my car is the love of my life! (after my husband, of course
It's a hybrid, so I average about 50 mpg highway and 55 when driving locally, and it's much less expensive than the original Prius (entry level Prius-Cs are around $17K-18K, while the original Prius is more like $25K). It was a little more expensive up front than, say, a Fit, but when I figured out how many miles I drive a month (around 1600), the gas savings more than made up for the higher selling price.
If you're not interested in a hybrid, I have 3 friends who recently got Mazda3s, and have nothing but rave reviews for them as well.