I'm a converted organ player, so I'm used the 61 note boards, but as stated early on I have problems with hand placement for some piano work. Often I find that I need to transpose an octave down to keep the sound in range and my hands from playing too low on the keyboard.

I simply like a larger keyboard as long as the size and weight are not prohibitive. As for piano-style square keys and weighting, that's another discussion altogether.