for older style: mine has gotta be the ZX7-RR (the ones from 1995 /1996).
I know they're old, but they have the classic look to 'em, and have won so many open class championships in the past.
my other ultimate fave's are the new kawi 636, and the yamaha YZFR1 (the black flames edition), my friend has a R6 black flames edition, and it's a sweet looking bike!