The gameplay for FFVII is turn based and must definitely feel not as friendly as today's RPGs...that even if still turn based designers have made them more friendly for the player....you might find random battles in the world map annoying..I did hate them in the FF games until finally you could choose to avoid them...but FFVII is definitely a great game.
PS Classics look great on the PSP, the small screen and resolution hides many of the imperfections...on the PS3 looks not so good but only as they looked then when you played them, it's kind of bad that PSOne games are only emulated rather than imrpoved a little
I played SIREN:Blood Curse a while back, I posted a review in AGE's review section, I agree about the camera, the game was definitely worth my money, though...I still think the same about the game, scariest game this gen so far....I assume it's even cheaper today.
My other PSN favorites are: Wipeout HD, Piyotama, Pixel Junk Munsters, Pixel Junk Eden, Super Stardust HD
'Calling All cars' is a really fun game if you have someone to play with at home, 4 player split-screen...it has online but you find barely someone online nowadays.