Definitely fun to own, car has loads of personality.
If you just want/expect a completely anonymous and conventional economy sedan, look for a used 2006 Jetta TDI (as new cars those were denied to Californians by our oppressive and probably corrupt bureaucracy). TDI trounced Prius and all other contenders in highway mileage in a 2006 Autoweek highway trip mileage test, burning biodiesel, no less. Actually, a decent used TDI will probably cost more than the new smart passion.
Assuming that you have actually driven and understand the smart, it is technically interesting and thoroughly entertaining to operate. Worth every dime. Yes, we have other cars (probably too many.) This one looks like a keeper.