How many different types of vehicles can you drive?

For example, I don't know how to drive a standard-shift car. I can probably figure it out having tried a few times, but if in a SHTF situation someone said "take my car" I'd be screwed.

Driving my riding mower today made me realize I've never driven a tractor or large farm equipment like that.

I've also never driven a motorcycle.

18 Wheeler ? Forget it.

I can drive the hell out of my Rav4 though!

Point is, some folks seem to have a diverse array of experiences when it comes to driving stuff. Others of us don't. Could I figure them out if forced? Sure, but it would be unnatural and much time would be wasted. Can you imagine if someone was depending on you to drive them to the hospital and you're sitting there trying to figure out how the clutch works?

Where do you fall in the spectrum?