i think this really depends on the guys definition of what is 'high maintenance'. I always think of a girl who is always asking for money for shopping and beauty stuff, and who demands things constantly, whether it's sex or just demanding the guy do all the cleaning, or that he fixes the dripping tap.
My boyfriend reckons i have my moments of high maintenance, when i say i'd like to go out for a meal, or go out for the day, or that he drives me around and picks me up. I dont insist he pays for that stuff, i always offer, but he usually does pay.
But i never nag him, as i'd hate that. I think i'm on a middle ground. Well i hope i am!