I think you should just relax, stop worrying about it and go with what comes natural to you at the time, with whoever you are with at that time.

You will probabely find that depending upon the individual circumstances and exactly who you are dealing with in any given situation that your dominance (or submission) will emerge just fine when its needed.

I know mine does and I'm identified as a slave myself, but it didn't happen overnight, it took years to really get there.

If you look around you as you go about your day to day life you will see people all over the place switching back and forth from dominant and submissive behavioral modes without ever even thinking about it on a conscious level.

The cop who is dominant pretty much all day with his 'customers" who is submissive to the waitress at his favorite breakfast nook.

The teacher who is quite dominant with her charges at school, but meek and mild allmost begging to be collared when she goes into the teachers lounge for lunch.

etc etc etc.

Relax a bit...go with the flow, stop trying to overanalyze your place in life.