I actually really like them. The only other profiles I've tried are XDA and OEM (naturally), and MT3 feels like the best of them. My fingers just kind of fall right into the center of the cap every time because of their scoop.
-White on Black
-Black on White
-/dev/tty (one with R4 and one with R5)
-biip MT3 Extended
-Susuwatari
-biip MT3 Operator (in the mail)
-MiTo MT3 Cyber
-MattM3o MT3 3277