Favorite handheld gaming system ever?

Whats ur favorite handheld gaming system? Mine is the Gameboy advanced sp. 3ds is my second choice but not nearly the amount of great games as the gba had. What's ur fav?

@vaidream45:

Most people will disagree but mine is the PS Vita. Mini ps3 powerhouse, psp, ps1, ps now, and ps3 and 4 accessory rolled into one. Then after that, the Gameboy Advance.

Mine is the 3DS, the diversity of the library is insane. Its got bout everything i have ever dreamed of. Plus its got a bunch of old stuff and can play DS library.

Sorry for the duplicate thread. I dunno what happened. Mods can u merge the threads by any chance?