Samsung Strive SGH-A687 (black, AT&T)

Pros: Keyboard is great and really easy to use, not sure what other reviews mean when they talk about the flexing.
Threaded texting is amazing
Plenty of shortcuts / quick access keys
GREAT screen
Not too large

Cons: Center button connects to internet when not on a menu (annoying if you don't have data)
Fingerprint magnet on screen
Had to return first one because of loose sliding mechanism, but 2nd one has been fine / no problems.
Call quality average

Summary: If you don't want to spend money on a data plan but text a lot, this phone is great. The keyboard feels good on your fingers and is very accurate, but sometimes will miss a letter if you go too fast.
The screen is very nice to look at, and the battery life is better than I was expecting -- I seem to charge every 3rd day off medium/high texting use and low call use.
The plastic feels a bit cheap, but I'm planning on getting a rubberized case and screen protector.
It feels like it will last for a while, and texting is a breeze, which is all I really need, so I really like the phone.