No. I've played IV to XII (except XI) and Tactics. I had fun with them, but never as much as in the PS1 days. I'm older now and I have to prioritise my time better, games have to be really rewarding if I'm going to spend 50+ hours with them.
All the reviews so far suggest to me FFXIII will not be good enough for my standards now. FFs since and including IX were already forcing me to question the value I got from playing them, and FFXIII sounds like it does away with most of the redeeming features they had.
Nice graphics and funky character designs alone just don't cut it any more, but that seems far and away to be Squenix's main priority nowadays.