I think of high maintenence as someone who colors their hair and more drastic color, has fake nails, constant pedicures, must wear the latest, has a purse and matching jewelry for every outfit, tans a lot, shops/spends a lot, wants her way, talks about herself, thinks life revolves around her, must drive a certain kind of car, live in a certain neighborhood, etc. etc.
People can do a few of these but when you roll it all into one, it equals high maintanence to me. I don't want to be around anyone who is high maintenance. I ind them to be less than pleasant. JMHO.