So, here is my Inception thing that no one else here has said:
It seems damn stupid to use someone else's Totem. The whole point is that Only You Know. Also, everyone knows what the gimmick is on the top, so secrecy? nsm. Finally, the difference between Cobb's and the others' is that the top does not function as expected in dreams, but does in the real world, whereas a loaded die, or a mis-weighted bishop would be rendered by someone unfamiliar with them as "normal" (random and of appropriate weight, respectively). The only way that I can see the top working is if he nudges dream-reality enough to keep it spinning (totally do-able for an Architect). However that depends on his subconscious realizing and wanting to acknowledge that it is a dream. Thus, if all that it takes for the top to register "reality" is either the person running the dream knowing how the top works (if they can override him) or him not wanting to know that it's a dream.
My theory on how deep is limbo (we talking about this at some length, though it hasn't really come up here) is that it's just below whatever the lowest constructed dream-reality is, thus time is very fluid, and probably subjective, which explains the asymmetrical aging of Kaito and Cobb.
The other thing that struck me, watching it, is that there is no character in the movie whose gender was particularly relevant to their character. Thus, there is no good reason why we had only one member of a 6-person team be female. In fact, I was gender-swapping Cobb after the movie was over.
And, in getting to the last tab of links on the movie, I have another thing. Dom's name is relatively un-referential (except to Nolan's own work), except that this movie talks about the subconscious a lot. The opposite of Sub(conscious) being Dom (Cobb).