Are you, or is anyone else you know, primarily a solitary bicycle commuter of many years?

Yes!

Are you so hopelessly addicted that you can't imagine your life without bicycle commuting?

Pretty much

Do you plan activities so that you can include a bike ride?

All the time! I work from home, so when I'm not at client sites - no commute. I almost always find some errand that I HAVE to do on the bike

Are you ever late somewhere because you wanted to ride, even though you could have driven?

Hmmm. I'm pretty much never late, but that's not to do with cycling one way or the other!

Have you ever gotten off early from work to get in a bike ride before an appointment?

Yep

Been to the doctor's in sweaty clothes?

Doctors? I cycled home from the hospital after minor surgery two years ago!

Suffered uncomfortable weather so that you could ride, and you'd do it again in a hearbeat?

Yep

Give people a confused look when they ask you, "Are you going to ride today?"

Yep

Ridden a junk bike because that's all you had at the moment?

Yes, though not any more. There's a reason I have >20 bikes....

Built a "Frankenbike" when your preferred ride was broken down and you didn't have the cash to fix it, just to feed your addiction?

Yes, and just for fun. I love to knock something up out of all the parts I have lying around. Twice in the last 6 months for myself, and once for someone else!

Stayed up way too late at night fixing your bike so you could ride tomorrow, or to put on a new part that took longer than you thought it would take?

All the time my friend, all the time.