I'm a stylist and there are so many bobs (and shags and bob/shags) now, most of them you can't even tell it's a 'bob'.
Now, are you talking about the classic bob in which it is chin length and the front is cute a tad longer? If so, then yes, I would certainly still do that if it flatters your face.
I have a longer asymmetrical cut as well... it's about 4 inches longer in the front than the back. B/c my hair is wavy, most people don't even realize it's cut that way, but I do it b/c I love it. You can see the front of it here:
http://littlelovables.blogspot.com/2011/03/rule-breaking-...