Yup - took the MSF to get my license. I think I can handle it. It will be like basic training all over again - I need a confidence booster. I'm going to test ride one at a Harley Dealership (they sell Hondas too) and if it feels like its too much bike, I will look more closely at a GSX650R in-line 4 I found locally (fuel injected, yosi slip on, hydraulic cluch!). I don't want to go any smaller than that becuase I don't want to get bored with it, and the two-bangers don't do anything for me.
A GSXr 650 is even MORE stupid than a 919 for a first bike.
Only way you'll get bored quickly with any bike is when it comes to straight line acceleration. And no, a bigger street bike is NOT like basic training all over again, its a different animal altogether! Why? Well, other than the usual elements such as more power, weight, etc., but also because of environmental factors such as traffic, other people, stupid people, road conditions, weather, etc...
A Ninja 250 is a hoot to ride, and if you're concerned about small bikes (which there's need to be, you are after all, learning), get a Ninja 500 or something similar. Stay away from the I-4s and bigger bikes until you actually know what you're doing. Otherwise you're doing yourself a disservice by making the learning curve much steeper than it needs to be.
Entirely up to you though.