Tactics does count right? I believe the story has aged well. Going from a pawn to a real catalyst in the war really made me feel Ramza's development and motivations. Also, I think the story took the whole "church is evil" theme to a different level...as well as "war sucks, no one wins in the end".
For main series...I'll have to say X was the best. The immersion was there save for the cheesy parts...heck it was so good I actually played through X-2 for closure. I wouldn't put myself through that torture if X's story was horrid...haha
Not playing down your tastes or anything, but it's also feasible that you played it because of the production values at the time, and because of your own investment in the game. I certainly feel that way with some games. Only weeks, months, or years later do I really sit down and analyse what I've been playing. It takes time to get away from your fandom, as well as a want to eradicate as much bias as possible. It's hard, but necessary for earnest critique in the end.
I realise not everyone likes doing this with their media, but I'm a big fan of analysis. I like a certain amount of being honest with myself about questions of quality, and I do encourage it in others.
I don't think you are at all. But we have to remember these are games we've played years ago anyways (most of us). I'm just speaking from my recent replays of these games. Although it's interesting to read unbiased opinions on games (especially pre-purchase). I believe it's the personal fandom, bias, and connections to the story the really make it "stick" to me. Like VIII used to me my favorite story...till I grew up...hehe