The only thing that... to this very day made no sense to me:
Why did Odin show up in Laguna's flashbacks for me? That's a total paradox, man.
Odin was in the Centra Ruins, but Laguna never even went near them.
I could see and understand if he was a GF you could junction to Ellone and she could send him in to the past like the other GFs, but Odin wasn't a traditional GF... he worked independently of the party...
Especially funny was when Laguna was working as a film actor and ended up fighting a "real" Ruby Dragon...
Then all of a sudden Odin swoops in and cuts it down... WHAT THE HELL, ODIN!?!?
Not that I don't appreciate an easy boss fight.
Hah! That's never happened to me. Of course, it's just the game mechanics working independently of player choice, but let me see if I can justify this...
GFs are fae-like spirits that inhabit the world of
Final Fantasy VIII. Long before Dr. Odine developed junction technology, humans and GFs co-existed, although there aren't many records of them co-operating. It's possible, however, that GF and human co-operation did exist, and it would have looked like the power bestowed upon the party by Odin, Gilgamesh, Phoenix, Boko, and Moomba -- that is to say, the GFs can sense where the party is and help out whenever they damn well please. So in that sense Odin is a VERY traditional GF
While I don't think it's totally unthinkable that Laguna traveled to Centra and won the favor of Odin in between his tenure in Winhill and his journey to Esthar, it's also likely that Odin is helping out Laguna because Odin is sensing the spirits of the party with Laguna. But if Odin is locked to linear time (a fair assumption... although anything goes with fae-like spirits) why would he care about the party? They won't visit him in the Centra ruins until 20 years later, he shouldn't know about them yet! Unless... he senses the powerful energies that the party's spirits bring with them into the past - junctioned GFs, drawn spells, etc. It's possible Odin sensed this and came to check it out. If that's the case, then that might explain why you can win his favor in the first place -- he felt your energy 20 years ago, and while he's not super interested in binding himself to you, he'll still co-operate.