Good beginner motorcycle?

Hello. I'm 21, 6'0, and about 160 pounds. Oh, and I'm male. I was wondering what you guys think is a good motorcycle for a beginner. Also, I don't want it to be a bike that I would train with, and then sell it....I want a good starter bike that I'd keep for a while. I'm not look for those "biker gang" type bikes where you're leaned back and fully upright......just more for my age group....kinda sporty but not racer sporty. I was thinking maybe a used Honda Nighthawk? I hope I'm being clear and I appreciate any input. Thanks!