Wheelie bin detection! Just kidding
(though seriously, it does have that)
Fast acceleration. I've not been in a performance model but even the LR has a decent kick to it. If you get bored of that (I still haven't) you can buy a software upgrade that makes it go even faster.
Pretty quiet - My favourite thing about this is how it sounds during acceleration/deceleration. Very sci-fi. Also, consider those times you see someone leave some traffic lights with their 4 exhaust pipes going "BBBAAAAAAAAAAARRRRPPPP" down the road. That doesn't happen in this car - you can launch yourself from a green light and the car won't struggle at all. People complain about wind noise at higher speeds. It could certainly be quieter (I think newer builds may have addressed this?) but I find it quite relaxing to hear. Reminds me of being in a glider.
One-pedal driving - You get used to it really quickly, right down to judging the stopping distance when solely slowing using regenerative braking. It's really smooth. A little anecdote on this: Previously, I had a habit of pumping the accelerator pedal rather than keeping it steady. My partner pointed this out to me as it was noticeable when she was a passenger. This stopped when I got the Model 3 as the regenerative braking makes the effects of this a lot more pronounced!
Safety - Fortunately I've had minimal encounters with any of these features (forward collision warning is startling but very handy for telling you when someone has slowed significantly in front of you.) I've seen some of the wrecks people have got into though. Aside from the design of the chassis, the software does a lot of stuff using the cameras and sensors to try to keep you safe. Sometimes it gets it wrong (falsely thinks there is a problem when there isn't) but this may be addressed by software updates. Which leads me to...
Software updates - They're not perfect, things break etc. I don't care much about the games that get added. The UI changes that have happened in the past few months bother some people but not others. Since getting the car, several nice things got added. One of my favourites was the option to basically enable one-pedal driving. Previously, the car would slow down with regenerative braking but you'd need to apply the brakes eventually to come to a stop. Then, you could press the brake pedal again to "hold" the car. This all got wrapped up into a "hold mode" option, where the car does all of that for you. A dashcam viewer got added, which is still a bit flaky but for the most part it's usable. Recognition of various things got added (wheelie bins, traffic lights, traffic cones, arrow markings on the road, speed limit signs.) I'm sure there's more that I've missed.
Dashcam/Sentry mode - Not perfect as it can sometimes cut the part of the video you're most interested in watching! But you get to see 4 different angles. Sentry mode records when people are near your parked car. It drains the battery a bit though so not that useful to have enabled all of the time.
App - The climate control can be turned on and adjusted remotely. You can also beep your horn or flash the lights if you can't remember where you parked. If someone else is driving your car, you can see where it is.
Fuel - Electricity as "fuel" is cheap. If you need a home charger installed, obviously that costs a bit more up-front though. You can charge it overnight on a cheap night-rate tariff and have it ready to go in the morning.
Driver profiles - Seat, wing mirrors, steering wheel all adjust depending on the selected profile. Check out the "easy access" profile which moves everything into whatever position you find most comfortable to enter/exit the car, and then selects your normal profile as you're about to drive (thus moving everything back in to your preferred driving positions.)
There's probably a lot more I could list. And there's probably a few things I could say "eh, that could be better". But would I return it? No, not even if they gave me a full refund after over a year of ownership.