There's hope for the PSP yet...
...because both Loco Roco and Lego Star Wars are incredibly cool and fun on it. What's the secret? Colorful, stylized, but high rez graphics, and addictive gameplay. These games really show what the PSP can do when it's not trying to be a little bitty PS2. Sorry, DS Lite, but the PSP gets to ride in the airplane bag next week.
(Yes, I'm aware Lego Star Wars is an example of a big console title that got ported to the PSP, but it still feels like it was meant for the PSP.)