Being a straight male, with a "life" (to some degree >_>) I'd say neither, they both suck. HOWEVER. If a gun was pointing directly at my testicles upon the time of questioning, I'd probably say Facebook, purely because MySpace is full of lose and fail and I hate it so. =3
Yeah, FF 6 is great. Real great. So is 7. 8, though, is a cut above any RPG I ever played. Most people won't agree, but if you have an ounce of brainpower to master the Junction system, it's really a step above.