Well seeming that this is a FFTA thread, most people will probably say FFTA

I think FFTA, mainly because it's addicting, and FFX-2 is too fast for me (maybe I should get a PS2 and buy it so I get use to it!)

Have you played FFX? That will help understand X-2. But if you haven't played X I would suggest FFTA....

Anyway its up to you