fixed.
to be honest i think that a cheap, used copy of Brain Age IS worth it for the sudoku tho
Actually, that's all I used brainage for, heh.
I should expand on my love for PSP. It wasn't just my awesome-o mp3/movie player. It had some of my favourite games of late. Both Grand Theft Auto instillations were tops. I especially liked the Liberty City Stories because (as far as city layout) LC > Vice City. And the adhoc GTA gameplay before GTA IV came along was terrific. Uh... Oh god, I just have a stack of vidya gams I loved on that console. Even the shitty ones were pretty fun:
Ape Escape: On the Loose ~ I hadn't played Ape Escape before, and this was a fun little romp of monkey catching.
Armored Core: Formula Front ~ Really enjoyed this one. Where it lacked in gameplay, it thrived in stragedy. (You set up your mech weapons, boosters, AI and let it duke auto-battle with other mechs)
Castlevania: Symphony of the Night ~ Come'on.
Crisis Core: FF7 ~ A good one-time playthrough. It had an alright battlesystem, and the ending was great. Good for FF7 nostagia, moreso than the other parts of this 'ff7 series'.
Darkstalkers Chronicles ~ I'm a DS fan.

Cube ~ Inventive puzzle platformer. Fun, medium-paced, brainteasing. Love it. + Level maker.
Death Jr. ~ The first platformer / shooter to really challenge me since PSone's Blasto. Yet, the black humour made cutsy was a little weird.
Dungeon Maker: Hunting Grounds ~ This surprised me. It was a lot like Jade Coccoon in presentation; except instead of endlessly capturing and breeding monsters, you're making a labyrinth to invite monsters in so you can kill them for sellable items to further your dungeon-making inventory / equipment / magic. If you like dungeon-crawlers that pretty much lack story and are full of hacknslash fun, this is for you.
Echochrome ~ Another interesting puzzler, though the small amount of levels make it a rental more than anything.
Everybody's/Hotshot Golf ~ being a Hotshot fan since PSX, this was a no-brainer. As usual, they made gameplay tweaks to keep me happy, and plenty of unlockable costumes / characters.
Exit ~ A rental, if you don't like puzzles. It has a cool concept and look appeal to it, but beyond that the game can be as repetative as those Mario Vs. DK games.
Final Fantasy Tactics: The War of the Lions ~ Worth it for the upgraded script and cutscenes. The new jobclasses are moot when you get Cid, just like any jobclass character in the original--however, it's all the same fun. First gen PSP's experience a tiny bit of lag when casting spells/items. (though it wasn't so terrible that I noticed; I'm relying on others critical opinions here)
fl0w ~ Just as fun as on PS3. It's like Spore LVL1. Go around eating other organisms and advance to the next genetic stage...
Grand Theft Auto : LBCS & VCS (as stated above, both cames rock.)
Jeanne d'Arc ~ A tactical RPG akin to FFT, minus the job classes. The characters are all set with weapons and you use stones to set various skills. One of my favourite PSP games to date.
LocoRoco ~

I can't describe this, or why it's fun. It's fun for the same reasons Katamari is addictive.
Lord of the Rings: Tactics ~ Another good tactics rpg. You can play as the Fellowship, or the badguys. I'm not a big LotR fan, but this was a satisfying game to play. My fave. fight was escaping Moria and trying to avoid the Balrog... AND THE DWARF KICKED HIS ASS.
Me & My Katamari ~ It's hard to hate Katamari after you've played it. This did a reasonably good job recreating the gameplay of two analog sticks with facebuttons, and the credits stage is to die for.
Metal Gear AC!D ~ If you take the story with a grain of salt and know it's not 'cannon' you'll enjoy this more. It took me off guard, but I fell in love with the card-based tactical sneaking ops.
Metal Gear AC!D2 ~ You have no choice but to take this vibrantly coloured, heavily stylistic MG with a grain of salt. It's strictly over-the-top. Yet, there's way more cards to choose from, and a wide variety of levels to traverse.
MGS: Portable Ops ~ Though stage-based, this felt exactly like Metal Gear Solid 1 and quite nearly had MGS2's graphics. This is a must-play for MGS fans, as it explains a lot about Naked Snake and answers a lot of questions left hanging in previous MGS games. The only downside was the stupid Metal Gear. Totally uncool. However, the cutscenes (that played like a digital comic) were terrific.
PaRappa the Rapper ~ If you were too young to play PaRappa on PSX, this is a good time to catch up. Kick, Punch, it's all in the mind!

Patapon ~ A rental, but the rhythmatic gameplay is hypnotising... Pon Pon Pata Pon... Pata Pata Pata Pon...
PoPoLoCrois (RPG) which I didn't beat, but got to the end dungeon and got sidetracked. Game was freaking awesome.
Power Stone Collection ~ Dreamcast's best fighting game in the palm of my hand, plus... the sequel... Love it. The addition of the Dreamcast VMU minigames is neat too. It's like they stuffed everything Power Stone onto PSP.

Sonic Rivals ~ You face off against other Sonic characters, while at the same time dashing along as fast as you can, through a VERY classic-feeling Sonic game. Best Sonic since Sonic Adventure...
Sonic Rivals 2 ~ More of the speed, a lot more, and same great gameplay with the addition of some Game Gear Sonic gameplay elements (See: Hang gliding).
Twisted Metal: Head-On ~ God, the hours I spent playing this online... Probably rivals the time I put into Call of Duty 4.
Wild Arms ~ Somehow I missed this RPG on PSX, but got to it now... wow, fun times man. Bad 3D Graphics for graphic whores, but a great game nonetheless.
WipeOut Pure ~ Uh, it's WipeOut. Different levels, online play, and new vehicle designs. It's WipeOut... That = fun.
Worms: Open Warfare ~ A little laggy but a great worms game. Ad-hoc was fun.
Worms: Open Warfare 2 ~ More lag, less fun. Better gameplay though. Perplexing... If only you could turn off those dumb backgrounds it would run like silk.
That's my stack of games. I enjoyed each one for their own reasons... The least fave on that list was the last one (WormsOW2). There's at least ten games I want to play still. God of War, Ratchet & Clank games, Daxter etc... never got around to 'em.