Well, Ontario is huge, and has some very large cities, I would think there would not be enough combinations for 6 digits. I think Arizona and Wyoming have some pretty looking plates.
Interestingly, Ontario has a population of 13,210,667, while Texas has a population of 25,145,561.
The yellow colour of the NJ plates is a little off putting for me, not my most liked plate.
Ontario's basic plate is pretty boring, it's stamped, reflective light blue and white with a little crown in the middle. Here's a list of our custom plates, there's quite a few to choose from:
Graphic Licence Plate Choices - Ontario.ca
In Ontario, you buy a registration sticker yearly for the plate, usually around the owners birthday. You have to pay for it. You need to prove that you have insurance and a valid emissions test. So if your car fails its emissions test, no new sticker and then you get pulled over and fined. It's a crime to steal the stickers off another plate. It's about $80 for a car. They won't give it out if you have fines and I think they even refuse to give it out if you aren't paying your child support.
Our truck plates have black text and a white background. Farmers get a plate that says Farm down the side of it, you get it if you qualify as agricultural and they wave the emissions test and such.
Back in the day, you had a year stamped right on the plate and you had to buy a new set once they expired. They sucked.