1. Depending on conditions, it takes anywhere from a few minutes less to a few minutes more to ride. It doesn't take any longer to put on motorcycle gear than street clothes, the only difference is the jacket and helmet. In the fall and spring, I'm going to wear a jacket anyway, so that's a wash, and putting on a helmet is less time than scraping the frost off a cage. I can put my helmet and gloves on while I'm walking to the bike, so the only extra work is rolling the bike out of the garage.
2. Dress codes are totally uncool, man.
3. Lunch. Nothing in walking distance, but taking the bike (see #1) is generally faster than a cage, since it's a heck of a lot easier to find a spot to park.
4. Weather. Rain, major temperature differences between morning and night (this morning, 54 when I left, it's currently 88 and should be well into the 90s by the time I leave) are normal.
5. Not a problem.
6. Have to face the exact same traffic either way.
7. I pay for my gas, so the FJR is a plus in this department, not that it really matters, I'd ride even if my cage ran on something cheaper than my bike does (you know, like baby seal oil or moonrocks).
I ride to work if the temperature is above about 28 degrees in the morning and roads are clear in the winter. In the summer, any time the chance of rain is 30% or less, or if the chance of rain is isolated to a time period that I won't be on the road.
I used to agree with that. My temperature tolerance has gotten a little lower, in fact really it's now just that the roads are clear. And the rain used to be like that, until I rode across the state in a '1000 year flood' causing rainstorm. Now, I pretty much ride if it isn't raining when I leave, and they are only predicting rain, not extreme thunderstorms/hail/tornado/etc.