With a 30" inseam ( me same same) you'll definitely be able to flat foot the R3Hi guys. I don't have an R3 yet but it's a bike I'm considering getting within the next few months or by the end of the year. I'm not a new rider, I've actually owned a 2003 zx6r for almost a year and a half now. It was my first bike though and I feel like I missed out on the beginner, smaller bike phase...
I haven't had a chance to go to a dealer to look at an R3 or sit on one yet so all I know about the physical size of it is the listed dimensions and the seat height.
I'm 5'7" with a 30" inseam and can almost get both feet down flat on my 2003 zx6r, which has a seat height of 32.7". It felt big when I first got it but I'm generally used to it by now. Would I be able to flatfoot the R3 easily since its seat is a whole 2" lower? I really want this to be a bike I can feel 100% confident on in any situation. I know flatfooting isn't necessarily important, and even now I only put down one foot at lights, but it would be a huge plus if I could plant both feet firmly on the ground with this bike.