Trauma Center Second Opinion and New Blood.

de blob
little king's story
muramasa - the demon blade
red steel 2
beat the beat: rhythm paradise

they're all great! i don't understand why de blob gets so little love. its concept is genius!

Forgot about this one. Excellent game, and proof that motion controls can offer a kind of fun conventional controls simply cannot.

Blur and Split/Second

Overlooked by whom? Critics or sales?
Here's some games I think didn't receive the love they deserved:
- Project Gotham Racing 4
- L.A. Noire
- Trackmania 2: Canyon
- Pro Evolution Soccer (the series)

Seeing that so many consoles games are getting loved, here are a couple of PSP games that may fall of many new gamers radar, tough they most definitely shouldent:

Daxter: still one of the best 3D handheld platformers ever made.
Crush: one of the most creative puzzle games of the 7th gen.
Dead Head Fred: has more fun in it then a bottle of whiskey in Disneyland.
Field Commander: Advanced Wars clone, but of the same quality.
Pursuit Force: this game revolutionized car combat games... I never understood how in the hell it got so little sales.
Syphon Filters: both amazing third person stealth shooters.
Ace Combats: 2 of them, arguably 2 of the best Ace Combat games, IMO.

And many, many more: Locoroco, Patapon, Jean d'Arc, Burnout Legends/Dominator and arguably the best JRPG collection on any system ever.

Just thinking about all these games I cannot wait to get my PSTV so I can play them on a TV :D

Either, whichever you prefer. Or both.

De Blob (Wii)
3D Dot Game Heroes (PS3)
Boom Boom Rocket (360)

Would be the main game from each format that I can think of.

Me either. Loved that game, one of the best on Wii. Never got to play the sequel though.

If you enjoyed the first game, the second one is definitely worth it. They tightened up the controls, and otherwise it's more of the same, in a good way.