If you're picky about graphics, then start with FFVII. FFVIII is good but the Junction thing is confusing at first (once you figure it out it is the best system of all the FFs IMO).
My favorite FF is 10. It is the best FF EVER (maybe 8 is, but I'm not sure).

Though if you start with 7, be warned, Sephiroth is a pain in the ass to beat. 80,000 HP plus 80,000 more if you use Knights of the Round Table on Jenova, plus 30,000 for every character at level 99. I was lucky to beat him once but I never saw the ending. I keep trying but I can't do it again (I almost got it once, but Tifa became confused and used an X-potion on him)