I mean for just around campus, I fail to see why the hill is too big to get a bicycle. Unless we're talking a 600ft climb, in which case, I'd love to have that problem.
Since that's not an option, I'd go scooter. Smaller, easier, hop on and go. Motorcycle is happier going faster. Scooter is great for riding around small areas and is as maneuverable as a bicycle. There's a reason a lot of dudes at the track use scooters for the pits.
If she likes the ninja though, by all means she cannot go wrong with it. Ignore the attitude from the Missus, no offense to her, but I think she's misguided. I vote scooter, but I'm a ninjette fanboiiii so....
From a college guy, I'd love love love love it if my girlfriend rode a red sport bike. Heck, I'd be happy if she rode a bicycle with me. I'm just happy she runs with me and plays soccer with me. She'll get adequate attention from the college gents, whatever she does.
