In reply to the cassin ridge: The NE spur direct has to be right up there in the list of top ten Alpine routes. Some of the rock pitches on the first day are truly awesome, as are some of the mixed pitches on day two.
We stayed at the hut - providing a fairly civilized start to the first day. We then bivvied at the obvious breche (which needed some serious clearing from snow). With hindsight (if conditions allow) I would suggest climbing another three pitches where there is a truly superb (and objectively safe) bivvy ledge. We then topped out in a bit of a blizzard - so we bivvied again on the descent (which totally paid off).
Your PS surprises me - as most Guides I know have a total passion for the mountains. When Graham and I climbed the Walker spur it was almost all Guides (for fun) who were on it. All except the Girlfriend of a Swiss Guide (which maybe answers your PPS)?!
I worried that climbing professionally may spoil my enjoyment - before I did it - now I just find it helps me get more out of my own time!