I use progressive. Ive switched back and force between them and Geico a few times. I know some peopel who have had good luck with Bikeline.
Most companies will give different people different rated depending on the factors involved. There wont be one correct answer for everyone. Your best bet is to get some quotes from multiple providers and go from there.
I have Progressive. I'm 23 and have a clean driving record (an at fault accident but it dates back before the period they check - i think 35 months?) It's expensive, but it's my first bike, I'm new on two wheels, and I got my loan through a credit union. Def just call around and get quotes, that's what I did.