Losing weight and getting in shape were my major goals and they have worked out to one degree or another.
I don't save money or fuel since my wife (who drives) and I only work about 5 blocks apart, so we could easily ride together. I do save money over public transit and biking only takes about 10-15 minutes longer than public transit.
After 3-1/2 years its become such a lifestyle it sems weird not to ride. And if I don't ride for several days I can feel the stress and irritation building.