I'm lucky in a sense since I'm really interested in what the companions do after the Doctor leaves. So I tend to take them from a canonpoint when they manage just fine without him. But it would still be nice for the Doctor's player to remember that even if I'm not playing Amy or Rory or River, our characters are still supposed to be friends. So I end up feeling like I'm not actually part of the Who Cast despite playing a Who character.

Oh well, at least I have good cross canon CR.