I've played FFtactics, but suffice to say, it didn't do what I was describing with Suikoden.  In all fairness, it was more like a game where you were a hero being forced to accept what the world was throwing at you and 'make do' with battle after battle all in an effort to survive.  And somewhere down the line, there's some plot about finding your friend and an evil church.  There's just little reason given to why you're the hero and more about people attacking you because they hate you or who you are associated with. 

Whereas the overwhelming plot of Suikoden was about the hero overcoming adversity, commanding an army because his ability to bring people together, trying to save people from being killed and through all that, stopping the worldwide conflict.

In short...I can't really think of two games with more opposite plots.

Well, the games do focus on different themes (FFT on the difference between social ranks, nature of religon, Suikoden on the things you've stated), but both of them also focus on a very realistic world, with a bit of supernatural that grows more and more important as the story flows, they both focus on what can only be described as normal human beings with their own flaws and such (no "badass" character or other cliches) and a deep focus on politics.

They both also have some of the best villians i've ever seen in games (only Vagrant Story, Xenogears and Wild Arms 4 have villians of the same calibur, in my opinion of course).

No one has said Braid? I'm ashamed at all of you!!!

I will just make a list, as I can't pick just one.

Braid (due to the fact that it's the only game I've ever played that had a story that could absolutely not be told in a movie or book, only a game)

Half-Life series (The best Sci-Fi story outside of the book Ender's Game)

Modern Warfare series (Gripping, controversial, and above all the never-ending plot twists)

World in Conflict (Deals with themes like the value of Human life, sacrifice, forgiveness, and loyalty)

Company of Heroes series (Even though there's no central characters, it's about the trials and hardships of an entire company of men)

Mass Effect series (Deals with themes such as the place of humanity in the universe, and how to make an impossible decision)

Dragon Age: series (hard to explain)

Legend of Zelda series (not an individual game, the entire over-arching story that runs through-out the series. It's got some really great themes such as loss, betrayal, forgiveness, coming of age, willingness to accept change, heroism, and redemption.)