Read the stickies at the top of this forum and then decide whether you want to pursue this question or not.
As for comparison to a car, there isn't one. I love my wife's f-body but my first bike ('84 VF500F) could still take it down. There are lots of negatives to switching to being bike-only, not the least of which is weather. Think about the things you carry/haul including passengers. It is rarely a good idea to only have a bike for transport and don't be fooled by mileage. Bikes go through tires far more rapidly than cars, require more TLC, and are more likely to be stolen, very generally speaking. Insurance is more expensive for younger guys and if you have any IQ above a rock you've got to invest in gear too, which isn't cheap if you do it right. Then you'll be replacing the gear on a regular schedule. For instance a lid (helmet) will last you about 5 years before you've got to find another $200-600.
Supersport bikes (GSXR, 600RR, ZX-6R, R6, 750cc+) are not cost-savers. 250s and 500s might be.
Dragging knee is for the track, and dragging tail is for the lot. --Kane Friesen
When you're in a car, you're watching a movie; when you're on a bike, you're in the movie. --Robert Pirsig
Identity theft is not Fun