Launch titles I bought at launch, eventually bought, or played. Not including what I played as a demo.
Playstation
Battle Arena Toshinden (It's actually quite impressive on emulator: 1080p60)
Rayman (Bought it last month)
Zero Divide (Mom bought it for me at a grocery store for $9)
Playstation 2
Armored Core 2
DOA 2: Hardcore
Madden NFL 2001
Midnight Club (Capture the flag in cars? Fuck yeah!)
Smuggler's Run
SSX (My first PS2 game and I paid for it with my own money. The graphics back then were amazing.)
Street Fighter EX3
Tekken Tag Tournament
PSP
Not a damn thing. I didn't get one until 2009. And even then I only bought it because Circuit City was having a liquidation sale and I found out I could play it on my TV.
Playstation 3
Genji: Days of the Blade (What a fool I was)
Marvel: Ultimate Alliance
Need for Speed: Carbon
Untold Legends: Dark Kingdom (Still in my backlog)
PS Vita
I don't own it yet. I actually own games for it though.
Playstation 4 (Games I'll most likely get)
Assassin's Creed 4: Black Flag (Day One)
Battlefield 4
DC Universe Online (Time to get back in it)
Flower (Day One because it's free to download if you already bought it for PS3)
Injustice: Gods Among Us Ultimate (Day one because Watchdogs is delayed.)
Killzone: Shadow Fall (Day One)
Knack (Might be a day one)
Lego: Marvel Superheroes
NBA 2K14 (Day One)
Need for Speed: Rivals
PlayRoom
Warframe
For me then, the PS4 has the strongest lineup in terms of games that actually interest me.