Window knocking and sleep woes
How many of us have had to physically KNOCK ON THE WINDOWS of some of those giant-sunglasses-equipped, leaned-forward-into-the-dash elderlies to warn them about changing lanes into us?
(well, all right, maybe not HAD to, maybe we could have braked, but it sure scares the daylights out of them)
And then there's highway hypnotism and sleepiness. I'll admit to having a few tough bouts with sleep in cage days.
That's the thing I love about motorcycles: (at least sportbikes, is it the same for big, comfortable cruisers, guys?) you're forced to pay attention to everything around you, all the time. It's a rush, in part, but also an odd reminder when you're in a cage and you realize just how much of a zombie you can be and still drive those things.
I remember that 4am shift I used to work when I bought my bike. The 12-mile ride to work turned from an plodding death march to quite the adrenaline-stirring wake-up call. It rocked.
Plus great parking.