He also turned down 3 different starship commands, which always bugged me, since he was always portrayed as this ambitious officer. Maybe Starfleet thought "Fine. We offer 3 different commands, you turn them down. Don't expect any shit from us any time soon."
That's what I was thinking. Riker might be seen as a good "middle management" type during TNG, but he's stepped back to many times to come across as having the brass ones needed to piss with the Cardassians. Look what happened: he had a meal-ticket post Borg Invasion, any ship he wanted, but he stayed Picard's number-one. Mid to Latter TNG Riker really didn't have that strong of a backbone. It's like they took a Kirk-style Character (Riker up through Season 3) and decided to turn him into Picard-Lite.
And it wasn't until
Nemesis, when people probably thought "What the hell. Data's dying and the crew's breaking up anyway. Let's have him finally get his own command after he marries Deanna."
I completely agree with your point. If you notice, Riker was offered the
Drake in 2364, the
Aries in 2365, and finally the
Melbourne in 2366. For an organization to offer not one but 3 different commands to the same person in a similar amount of time is extremely rare. And, as soon as Riker rejected the
Melbourne and
willingly stood down as captain post
Best of Both Worlds, the offers dried up. The only mention of Riker being offered a command from
Best of Both Worlds to
Nemesis is in some dialogue between Q and Janeway which could be interpreted to read that Riker may have been offered command of
Voyager as well.
SPOILER FOR BOOK!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
In the novel
A Time to Hate, Janeway, by now a Vice Admiral contacts Riker after his dad's funeral and tells him that Starfleet is offering him command of the
Titan, and that this is his absolute last chance.
He finally decides to take it.