I haven't played the first Final Fantasy, and since it's the one that started it all, I suppose it's the most legendary game in the series.

I also haven't played FF Tactics. I tried to play Tactics Advance, but just couldn't really get into it. I might give it another go, but I still would like to play Tactics. Maybe I'll pick up War of the Lions sometime. It should be down in price, since it's been out for a while.