Mildly Infuriating

On the other hand I had a guy get out of his Jaguar the other day and yell at me a while because I stopped too close to his bumper.

Are 'road sensors that trigger a light change' a real thing? I thought lights are on a timed cycle.

You should be able to see pavement under the rear tires of the car in front of you when stopped

So much that it's reasonable.
Example:
A driver fucking up and fumbling the start during shift (for manual). The car could jump forward/backwards and/or roll.
Which is bad.

Just care about your own distance as you can't do anything against those other drivers anyway.

But 2-3 car lengths? It really bugs me when they do it in a left turn lane causing a back up to the travel lane resulting in overall congestion.

This reminds me of one time I witnessed instant karma. I was driving behind someone doing this in crawling-slow heavy traffic, and got to one of those large intersections with such lanes. Here in Australia they're right turn lanes, though that's irrelevant for the story I wanted to share.

So right in front of me there was this car with at least four guys in it, loud music, and an imbecile on the wheel. I got stuck behind him on a single lane road with no means to overtake. He was driving somewhat below the speed limit for no apparent reason and leaving a massive gap before the next car in front. He still left a large gap when we both merged on a crowded multi lane road, and he kept that 3 car spaced gap at every red light stop. He would lag several seconds before starting to move, obviously not paying attention. I honked a couple times to nudge him.

One of those irritating assholes I guess.

Now, somewhere behind me on the lane to the left there was some other guy with a red convertible and an attitude that screamed "YES I'M OVERCOMPENSATING".

We got to the intersection where the turn only lanes appeared, and the idiot in front of me was once again holding traffic as he lagged to resume driving. But the lane on my left, which continued straight, moved just enough to let the red convertible guy right beside the idiot. And then all of a sudden the convertible revved and zoomed right in front and across the idiot, cutting him off and overtaking him on the turn only lane, sliding right in that annoying massive gap he was leaving.

That was the only time in my life I celebrated such a douchebag move. The slow idiot went insane. Started yelling at the convertible, gave him the finger. The convertible was the last car able to turn on that change of lights so the idiot and everyone behind had to wait yet again for green, but I wasn't mad. Watching the car in front of me shake with rage until the lights changed again made up for it. He didn't lag once they went green again.

I’m experiencing this daily in Los Angeles. Also people don’t seem to scoot up onto the sensor so the light takes longer than necessary to change (though stupidly half of those sensors are in the crosswalk or even beyond it).

Enough that you can maneuver out of the lane in an emergency.

I recall i was driving with a friend, and he was surprised I pulled up, leaving only a feet between my car and the car in front of me. I asked him why.

He said he grew up in an area prone to car-jackings. His dad taught him to leave that extra space in case someone tries to car-jack you. The extra space is so you're not boxed in by the driver in front and can get around them no matter what. Even if you have to jump the curb and escape on the sidewalk.

I agree that the sensor lights are annoying to deal with, but perhaps the driver has a reason.

I've noticed this as well, first time was Texas in 2020. I'd lived in other places prior and never noticed it. I've sinced moved away from Texas, and the bahavior is a lot less common here. I couldn't figure out why people did it. My theory is, people initially stop at a reasonable distance from the next car and pull out their phone. The next car moves a bit forward for some reason, and the person on their phone doesn't notice.

Enough for a person or a wheelchair to move between cars imo

There’s a light where there is a green right turn arrow. MFs will sit there and not turn when the light is red. No signage says not to turn on red, the rule is the same as any other light. I honk loudly and go around them (admittedly causing a traffic infraction to do so). My point is that some of the people we allow to drive are too stupid for the privilege.