Re: Why didn't Riker accept his own command for so long?
Well, whatever the single-pip flag rank would have been called.
RDML... Rear Admiral, Lower Half
And there is no reason that commodores don't exist... They could have put a 5th pip on Picard (of the little line thing they used on DS9 for Deputy Director) to show that he still carries a senior rank.
Two roads diverged in a wood, and I-- I took the one less traveled by, And that has made all the difference -