Ok, after 1000 miles with my Model S, here's my list of quirks and grievances. (No way to narrow it down to just 3.)
1) Sun visors need replacement. (Needs better mirrors, vanity lights, hopefully slightly larger?)
2) No way to open the charge port door from outside. (I've suggested to Tesla a quadruple-click on the fob; basically "open-open".) I don't have the Model S HPC, which is the only connector that can automatically open the port by proximity.
3) While driving, the same motion that on the Roadster activates the wipers, on the Model S puts the car in neutral. This can be very disconcerting at highway speeds; the first time I accidentally did this I thought the car died, and it took me a good 10 seconds to realize what was going on and correct it. The car should recognize this case (vehicle in motion, gear in neutral, accelerator pressed) and flash a warning or reminder to shift into Drive.
4) The floormats are starting to scuff and accumulate dust bunnies after just 1000 miles.
5) The key fob needs some sort of lanyard or clip; it's nearly impossible to attach to a keyring. (It also needs color-coding and LED headlights!)
6) At highway speed, sunroof whistles loudly during opening/closing.
7) Front doors and Frunk require a bit too much force to close. (I've gotten used to it, but passengers rarely close the door completely on the first try.)
8) Scrolling through iPhone contacts list takes forever; it needs an A-Z shortcut.
9) Changing radio stations, the slider tends to "rubber-band" and fly off in one direction or other when you let go...
10) Homelink: took forever to get it to recognize my clickers, even at point-blank range. Not sure if there's some other trick to this?
11) Daisy-chaining the Model S <-> Roadster HPC adapter to the Roadster 110v adapter doesn't work. It would be nice if it did.
12) Bricking the car for up to 2 hours during a software update is a bad thing. (What if you need to get to a hospital, or escape a fire?) There should be some sort of UI-less "emergency drive" mode accessible during an update.
13) While backing up, the camera feed covers up the HomeLink menu, making it difficult to back out of my garage and close the garage door.
14) The rear-view mirror field of view is somewhat limited. (You can't see to the horizon in the rear-view mirror, because the roofline is too low.) Keeping the backup camera active while driving is a marginally effective substitute.
All that said, I wouldn't give up my Model S for anything
Love it!!!