I feel this needs to be Sticky'd (and Official'd) so if anyone has any objections say so soon.
FF is easily one of my favourite series' of all time, right up there with Mario, Zelda, and Kingdom Hearts (also by Square <3) I only really got into FF in 6th gen though, and before that I had only heard about it and pretended to be a fan.
I will also say that Final Fantasy (and Kingdom Hearts) changed me from a Nintendo fanboy to a multiconsole gamer almost single handedly (the other big factor being that 360 is too good not to own for a hardcore gamer really)
Believe it or not I only recently got Final Fantasy VII for the first time, in the last month or so. I had never played it before then. People called me crazy, but it's 'k. While FFVII has probably become one of my favourite FF games already (not hard seeing as most of them are my favourites XD) I still think Cloud and Sephiroth are the most overrated characters in video game history. >=[
Zack, Tifa, Yuffie and RedXIII on the other hand are pretty damn awesome.
As for my favourite FF titles, it's almost impossible to say... This list will probably change around very often but it's definitely not set in stone. Atm I feel like:
Final Fantasy VI
Final Fantasy V
Final Fantasy IX
Final Fantasy VII
Final Fantasy IV
Final Fantasy III
Final Fantasy I
Final Fantasy II
(Keep in mind all of them are my "favourites" except II, which is still awesome, but just nowhere near as good as I IMO D: )
The only ones I havn't played (or havn't played enough of) are VIII, X and XII. Will get around to getting/playing them on though.
Oh, and I also love every game in the Crystal Chronicles series. :3