I have always preferred braces on other peopke to getting them myself, so my own dream treatment would be as little as possible required to do the job!
If I was designing something for somebody else though, it would depend on how much I liked them. I do like the idea of orthodontist's keeping quiet about length of treatment and appliances that need to be worn, and I also quite like the idea of patients having to arrive early for their appointments and not be picked up until afterwards (say 15 mins either side?). Also no removal because teeth look good, they have to be all problems solved.
If it was a friend, I'd say metal brackets & wire, powerchains, some form of device (Herbst, lip bumper etc) and combination headgear which they had to wear to school from time to time (say, if they didn't make their hours for the rest of the week). Three years or so plus retainers.
If it was somebody I disliked, then I'd look forward to them getting a metal mouth: full bands on both jaws, thick archwires, a ban on coloured ligatures, the same form of "extra-device" plus a combination headgear they had to wear all of the time except when playing sport (i.e. including school), but with a really obvious strap colour (e.g. black for blonde hair, yellow for dark hair, perhaps orange, green or even pink if they were really bad patients). Fixed retention after treatment over, so, 5 years or so?