So I just have the final battle to go on FF8 so here's some thoughts on my first completed replay since the very first one:
The game is a lot better than I remember. Despite the junction system being a very flawed game mechanic and basically breaking the battle system, that and the odd "why didn't Irvine mention shit earlier" are actually my only major gripes in an otherwise very good game. The other minor issues are all actually explainable either through in-game dialogue, or a little assumption from the player.
Ragnarok is by far and away the coolest airship the game ever produced, it's a fucking airship robot dragon, it's design is wonderful, and I always really enjoy the mission to obtain it.
I used to really like Irvine, but to be honest he's my least favourite character in this playthrough, instead Sell comes to the forefront a lot for me. I always liked him, but he's by far the most human in the game, and his passion and caring is actually the backbone of a lot of the plot for me.
The Rinoa/Squall relationship is a lot more awkward than I remember, but I guess as a teenager playing the game, that seemed more romantic at the time
The weapon upgrade mechanic is great, and I always adored it and much prefer it to having a million pointless weapons. I think a combo of that, and FF7's materia slots in place of the draw system for junctioning would be the perfect system.
Triple Triad remains the best mini game in the series, and combining that with the card mod ability makes for a great item system.
Still hate the way you gain money, but it's not a major gripe.
Seifer is probably one of the best secondary antagonists in a series, he's such a tragic character, and him being so similar but ending up in such a different place to Squall only exacerbates that tragedy.
I feel like of all games that could have a sequel/prequel in the series, this is the one. You could cover the Centea incident, the Hyne incident, or the Galbadia/Esthar war in a prequel, and the sequel could cover Ultimecia's rise to power (because you can't change the past, so the future she comes from is innevitable).
Probably more I'll think of, but that's a few random bits.