Braid, Castle Crashers, Final Fantasy VII, Prince of Persia, Wipeout HD, Flower are a good start.

Battlefield 1943 - Ton's of fun to be had

Flower - A beautiful relaxing game that is just plain stunning

High Velocity Bowling - Great party game, but also fun to play by yourself aswell (you use the SIXAXIS controller as a bowling ball)

Rachet & Clank: Quest For Booty - Enough said

PAIN - Great fun

Battlefield 1943

Wipeout HD

Ratchet and Clank: Quest for Booty

in that order.

Wipeout HD with Fury
Super Stardust HD
Savage Moon
Flower

I think the best PSN games (excluding FF7 which if you like FF is a good choice but in a way I don't so much see as a PSN game so much as an old classic re-released) are:

Wipeout HD + Fury expansion
Flower
Flow
Pixel Junk Monsters
Pixel Junk Eden
Battlefield 1943
Warhawk
Everyday Shooter (a real favourite of mine, no Trophies though if that matters to you)
Super Stardust HD
Echochrome


So I'd say you have plenty of choice...

Flower and Wipeout are my twin favs overall that I'd recommend.

Super Stardust HD
Fat Princess
Flower

• Wipeout HD
• Flower
• Super Stardust HD
• Fat Princess
• fl0w
• Noby Noby Boy
• Burn Zombie Burn
• MGS
• FFVII
• Shatter
• Super Street Fighter 2 Turbo HD Remix
• Any expansion packs or DLC you want
• Castle Crashers
• Braid
• Pixel Junk Monsters
• Tekken

^ You just named all the ones you could think of, didnt you?

Nope ;)

Thats about $100 worth, probably more. I have played and own alot of those, so I'm just naming my favourites. 

SF2HD remix is kinda redundant considering you can get much nicer SF4 retail release for like 20 bucks.
So turbo HD is mostly a good choice for ultra hardcore fans of franchise.