I find as a BE Hunter i had many choices of places to go and all were found from quest givers , what i did was the barrens and silverpine area , mainly because as a skinner the humanoids can be skinned there , as a hunter i like that area anyway , plenty of things to kill on the way to quests and Hillsbrad is not bad either once you are high enough , Ashenvale is a lot of running around but still pretty good fun but a lot there is over level 20.
The best advice i can give is travel around collecting quests from all the areas , if you pick an area where most of the quests are yellow/green and ignore/delete any grey ones ( unless you need the rep) that should be a fast way to level , if you get red quests and do as i usually do and delete them to be taken later you can have a full and varied quest log which i find stops me from getting bored questing in just one area.