I just got a personalized plate on my old car last year (my MX-6) - PUZZLER. When I get my 6 I'll prolly just transfer that plate, since they're so much more to get.
I was thinking of getting one that said ZOOOOOM on it (we're limited to 7 characters in Michigan). Can't do ZOOMZOOM (8 char); so I was considering the other. If it's not taken, of course. But I'll prolly just transfer my current plate over. Or I could get MARS M6.