Pretty decent sense, but not perfect. I can usually tell you, but very twisty roads can mix me up.
And when I went to the west coast - California - the first time after growing up on the east coast, I had a hell of a time with directions. The ocean is east, damn it.
with rare exceptions I pretty much know all the time. But I never give directions using north/south, other than things like “get on I95 South”. I might also give someone some general orientation by saying things like, “your place is south of X, so if you see X you need to go south.” Still, the specifics won’t include anything but left/right.
Yes, we both live in Sydney - I on the north side (but not the North Shore), she in the west.
Voted “not a clue”
I’m really bad at directions. When I think of how to get somewhere, it’s usually in terms of landmarks, not directions. I’m really bad at taking areas I know and seeing them as a map in my head. I never, ever think “go north two blocks, then east three.” I always think “go this way until you get to the intersection with the bank, then turn right, then go until you see that funny tree.”
I’ve read online that there is a gender difference in navigation, and my method is more common for women. But I’m a man, and suck royally at thinking in terms of cardinal directions or even maps (unless I’ve got my phone gps right in front of me)
I have a fairly solid sense of where the sun is most of the time, so that orients me (in this case, north, for I be in the southern hemisphere). It’s far from foolproof, and subtle curves to roads can temporarily disorient me sometimes, but it doesn’t usually take me long to get my bearings again.
I don’t drive, though. I walk most places, and familiarise myself with most areas I am heading to beforehand, via maps.
Driving or not driving, I don’t know directions very well. It also doesn’t help the slightest bit that I live on an island where we consider north to be the topmost part of the island, which is more like northwest or something.
I’m fine when I’m in Illinois, but if I’m visiting my best friend in Anchorage, I have to look around for the mountains. The water’s on the wrong side, and there’s no river. However, he’s amazed that I can tell cardinal directions in Illinois, where there are almost no visual cues.
As long as there aren’t conflicting external stimuli (most notably a body of water being to the west), I just about always know what direction I’m facing without even thinking about it.
I always know my directions, though sometimes if there’s no landmark around (e.g. the Ohio River, which is South), I rely on my car’s direction display. Sometimes, if it’s obvious, I’ll rely on the sun. When I was looking at getting a new car, one of the must-haves was the direction display. Now that I’ve been spoiled by it, I can’t live without it.
I’m very good with directions. Even after winding around taking lots of turns in a weird/new neighborhood, I still just have some sort of “innate” feeling for which way I need to go to get back to to a given highway or whatever. Sometimes I’ll start to 2nd guess myself only to find out I’m just a few blocks away from said highway.
I look at maps a lot and I store them in memory well. I can reorient them, twist them around. I don’t even really think in terms of left or right very much. When giving directions I’ll say “turn south on blah blah blah” because that’s what makes the most sense to me, and it’s the least ambiguous because it’s true no matter which direction you’re coming at the intersection. For you poor folks who say “what do you mean turn south? Is that a right or left?” I feel bad for yah but then I go through the mental gymnastics of trying to figure out which way you’ll be coming from and translating it. Then for you folks who forget which way is left and which way is right, there’s the whole “driver’s side” vs “passenger side” 
It might be interesting if you broke the poll down based on gender. I’ve heard that men tend to navigate with cardinal directions, route numbers, and miles, (Turn north on Highway 8 and go 5 miles). While women tend to use left/right and landmarks (turn right at the Shell station and then go until you see the big pine trees).
I picked the baby sister option.
Don’t know why, but I seem to possess an innate sense of direction. My dad has this, too. Waiting to see if this trait has passed to either of my kids.
Many years ago, when I lived right on the edge of the Green Mountain National Forest here in VT, I used to go for long forays out into the woods, just to futz around and enjoy the outdoors. This is not just a large park - the GMNF is about 400k acres of just forest - dense forest; mountains; small lakes/ponds; etc.
I’d go wherever I pleased. Up and down mountainsides, around ponds and small lakes, all completely off-trail. Never occurred to me to mind my direction. When I had had enough, I just kind of looked around and picked where I needed to go. Cloudy, sunny, near dark - made no difference. Always came out where I wanted, even to within a city block, often.
I have no idea why this is.
Maybe I have bird DNA…
Unless it’s a long road trip, such as to KY (in which case, I’m going west), I generally don’t have a clue.
I do know my office is west of the town I live in, though.
I generally know without having to think about it, but this is either because I’m driving in an area I’m familiar with or, if I’m not, because I’m following a mental image of the map I looked at when figuring out how to get where I’m going.