Minimoogs were 44 keys. I'm usually fine with 37 keys for classic solo/melody lines... though even then I would prefer 44+
It's in paraphonic mode that I miss the extra octave the most. With Matrixbrute, I loved being able to have that stretch with a low, walking root / drone, and plenty of room a couple octaves up.
MxB has four full octaves, Matriarch has four full octaves, Minimoog Voyager was 44keys, and even Pro 2 had the 44keys.
I feel the same about OB6/P6... one of the main reasons I haven't purchased them (though I did pick up a P6 desktop). I would rather that synth manufacturers (specifically Korg/Seq) would just release larger keybed, player's instruments, and then have desktop/rack units available for those who need compact solutions and want to just have a small keybed, a single master, or are only sequencing them.
@sdfstudios - your profile pic reminds me of HURT... great band that used to play around LA a bunch.