So, I'm not in the business of telling other free people what to do with their money and or life but I will relate my personal experience for you to consider.
First off, I'm a fat man (losing weight), and when I first started riding I still chose a ninja 250 over any other starting bike. I will admit, I looked ridiculous riding it, and after riding it for a month, I felt like I had "outgrown" the motorcycle but that was my ego talking and not reality. The reality was, I had outgrown the feeling of acceleration at full throttle, I was no longer getting that adrenaline pump when at WOT. If I was to go riding around crazy curvy roads, I would limp back to being a slow, new rider, and that adrenaline pump would come back. The biggest thing is when you make a mistake on the throttle when entering or exiting a corner on a 250, its much easier to recover from then a heavier, faster, bike.
That being said, I went from a 250 to a cbr 929rr. I had only ridden the 250 for 9 months and if I could go back in time I would of waited another year until I made the transition. The difference between a 250cc single cylinder standard and a inline 4 fuel injected sport bike is immeasurable. It was like learning how to ride all over again as the throttle was way more sensitive and the handling characteristics were very different. Of course, I also had way more fun on the sport bike (too much fun, lost my license once) and wanted to ride it more than the 250.
Now I have the fz and let me tell you I love this bike. It is so much fun to ride I love it! It has more torque down low than the 929 but makes overall less power so I feel like its a great compromise to keep me out of a jail
Cliff notes: You decide the type of rider you're going to be. If you can ride around responsibly while you're getting down the basic handling characteristics and avoid the temptation of WOT while learning you can probably survive this bike. It's your money buy what you want but be careful and ride safe!