Hmmmm. As I recall the Professor had it good. And yes, I'll admit to considerable fantasizing while that series was running. I'm also betting that the stoic and rich Thurston Howell was quite the partier when he could get away from Lovey!
Ginger -curves in the right places, legs just right for wrapping around you or pinning behind her head and she just exuded sexiness.
Mary Ann - the quintessential girl next door that was cute and demur in public, but I'm betting she was pretty damn naughty behind close doors.
I'd say both and at the same time!