I'm very fond of the games, I daresay, though I also enjoy the movies (especially the third and the fourth, about Entei and then Celebi and Suicune, respectively), and the first season of the animated series holds a great deal of sentimental value for me as well, as I once enjoyed it immensely (and still do whenever I happen to see it).
For a very brief time, I thought FF's VII and VIII would be good games for their involvement in Kingdom Hearts, though now I don't think them so at all. I really did enjoy FFX, actually, though I found the plot quite intriguing at first, though I feel as though it degraded in quality after a while. And yes, Tales does rule over all (though it shares its place with StarOcean for me at the moment, though the two franchises are very similar as far as I can tell, and I do like both very much).
I actually beat Sephiroth into a bloody pulp for one of my friends -- he later said he thought of it as a Christmas present, and I was delighted. I think that I may have overdone KH though, I am rather absurdly good at using magic to kill nearly anything (though I'm not very good in the Coliseum since my magic-heavy playing style is a drain on resources, and I have very recently taken to carrying massive amounts of ether).