Always on. No, not noticeable under streetlights but it is at any other times - including dark parking lots - and with my driving pattern it has grown to be one of my favorite features.
I am with you on that, I keep thinking when I drive my dads 2014 6 touring that it has just as nice of an interior as the 11 3 GT (although the faux leather is kinda not for me, too rubbery feeling, I prefer the mostly real leather of the 3 GT,bolsters and back are faux but have a pattern that looks and closely resembles the feel of real leather better than the stuff used now in mazdas (perhaps the GT trims still have better faux stuff around the real parts or have rela leather anywhere you sit now) anyways I always feel like it just lacks all the cool tech stuff I would want and have come to enjoy in my 11 3 GT like the HID lights with afs and the upgraded stereo and better seats auto on/off lights and rain sensing wipers, I never had a car with as many features before (the 11 3 is the newest car I have ever owned) I learned to love the leather seats, being in texas I thought I would hate them as they are black (car is velocity red, like those in the forum header) but I always have used a sunshade on the windshield when I am parked in every car this one is even special and got the $45 mazda logo one from the dealer as the autorama ones would not stay up right, the mazda branded on is nice, it comes with a bag to put it in, and is nice and thick, and molded to the exact shape of the windshield, highly recommend it if its warm a lot in your area!
My old 08 3 was the worst one yet galaxy grey with black interior man it was a sweat box in the summer! Even with heat rejecting tint, sunscreen in the windshield when parked, sunroof/windows cracked open, and it had great a/c. But that car has me sworn off dark colored cars for 2 reasons 1. they get too hot when its warm out, 2 they are too hard to maintain the paint on if your anal about it like me, galaxy grey shows every swirl or mark the car had, it was horrible about that.
Anyways his 6 does not have afs as it just has the standard lights (he did not spring for the GT as in 2014 in the 6 you could not get GT and a manual tranny) he wanted a stick, just as I would prefer my 3 had one but could not find one in my price range this time ( in the 3 a manual is available for all trims at least in 2015 it still was, the 3 is more the mazda of mazdas to me anyways so I think they offer more choices in the 3 because its the more popular car and besides the mx5 is one of the defining cars they sell as it is their fastest selling model ever) but he only got the touring trim and no sunroof, which my 3 has. I like these but don't really use them as much as I think I will when I first get a car with one. So he has the command knob and the steering wheel controls, 7" I think radio screen, Bluetooth(I think this was standard by then on the 6) usb port, 6 speaker stereo, 6 speed manual, faux leather upgraded interior, the dimming mirror and blind spot monitoring and not really much else.
I used to be one of those people that said "what use is all the extras for" but now that I have them, I realize how nice they can actually be. (mind you on a used car so I did not pay extra to get them) though the GT trims where going a little higher price on average then others (I got mine right in the middle of what nadaguides said it was worth at the mileage 10k-12.5k was their price range with mileage it had, trim and features and dealer purchase I got mine for 11k after talking them down 500 after pulling up a touring sedan 2.5 of the same color and showing them the lower price lol) they did not want to miss the sale, so they beat them, so not bad many GT ones from 10-13 where priced upwards of 13k with MORE miles on them then the one I got.
I think my next car will definitely have to have lights like these as I have really grown to like the bright white color they put out (many new cars use LED instead of HID now but still) the stereo I can always upgrade myself if I want more so it doesn't HAVE TO HAVE the nice bose 10 speaker like this one does, but auto on lights is nice I don't really care as much about the rain sensing wipers as I feel I should notice when I cant see well because it is raining and know when to turn them on, but still nice if it comes with the other stuff. Only thing is forgetting to turn them off when I go through the local really good carwash when I don't have time or its too cold to get out and do it myself (I like washing/waxing/detailing my car, and driving a clean good looking one) I can live without a sunroof, just nice to have like today when its 65ish outside with a south wind open the sunroof turn off the a/c and your feel great, I have also really gotten used to auto climate control, I feel my next car may have to have that (I can do without obviously) but it is a very convenient feature as it gets the car feeling perfect fast and then shuts up and does not run as hard as long as the normal one did. Bluetooth and usb ports I think have become standard everywhere so I don't have to worry there.
Anyways so yes after getting used to afs I enjoy the feature and feel it has its usefulness shown in side streets or backroads without street lights, even on the freeways at dusk with streetlights I notice it helps when going through sweeping turns. I have also grown fond and attached to many of the other features this car has that are not standard still, like when I got in my sister's 07 6 the other day to work on it, I went to do the push button start and said "oh shit yeah still gotta use the key" the intelligent key is nice too just hit the door buttons or use the fob, my work phone will interfere with it occasionally though but still nice. or the Bluetooth and sirus radio those have become favorites of mine (now that I have had the car almost 6 months and the Sirius still works I think the previous owner either has a year or so left on their package on it or the lifetime one, as I get every channel without buying a subscription, and I have changed the battery) So im waiting to see if it quits getting channels one day, and wont pay if it does, as I don't feel like paying for radio I can get free by downloading the songs on my phone.