Here in BC I have five options for plates aside from the default white one.
Unfortunately in BC they only let you choose a vanity plate on the first (1990's era) background.
I'd love the middle BC Parks one on my Strat Blue Supra, but it's not an option unless I go with a default tag.
I have a few vanity plate ideas that I may share once I choose mine. I've never been a big fan of the plates that just re-state what the car is. B58-6MT is boring (to me). Plates like Zupra or 3JZ BMW always make me laugh and they seem a far better use of a vanity plate.
My suggestion would be something personal to you, or something that will make other people smile or that feeds into car culture. Even better if it shows you don't take yourself too seriously.
Maybe get B48 AT on your 3.0 just to mess with people?
Other options: STICK
GDMJDM
LOLZ4
I've never understood the concept of a vanity plate thats specific to a particular car or car brand. I mean a vanity plate with "Supra" or "BMW" or "Chev" or something on it that is identifiable to the specific car seems dumb to me. It's like "yea I can see you're driving an X,Y,Z I don't need a number plate to tell me. To me a vanity plate is "owner specific" be it in attitude or some other personal criteria. Something you move from car to ar and use for a lifetime. Am I weird? Maybe. My Supra will be my first car with a Vanity plate I've ever owned. It's waiting to be installed if the fuggin car ever arrives.
I was never a big fan of vanity plates really. Not onto spelling out my name etc.. and as @lucky phil mentioned, car specific ones can’t be moved around with you.
Saying that, I do have a vanity plate of sorts, but the reason I got it was for it’s unusual pattern of numbers where it pleases my inner geek