K.M.
Hi A. -
I wouldn't worry about it. Like someone said earlier, we're so concerned these days with hitting the "milestones" on time that we freak out about it if it seems our kids are even a little behind! I know I did that with my own son - I was worried that he didn't walk soon enough, didn't talk soon enough - and then BAM! Suddenly he didn't need my help with anything anymore. (He's only 4).
If he's walking around with his toy, then he *is* pretty much walking. He may be stubborn as you said - or maybe even a little lazy? I only say that because I carried my son ALL THE TIME even when he was old enough to walk, so I think he knew that he didn't need to exert himself. LOL
Good luck. Sounds like a normal boy to me!