I prefer the ergonomics of the Campy hoods/levers. I love the thumb shift, don't have much trouble with it, I guess I'm used to it; but I do like the fact that you do have to go feel for it a bit. I don't like the feel of Shimano hoods, the angle and height.
what angle do you setup your bars/shifters so that you have no problem with the thumb button? do you think it is a matter of getting use to? i only have about 100 miles on my campy bike.
i also like the fact that there is lots of feedback when you shift.
the new DA10 hoods are strange... im not sure if like them or not.. they are very shinny near your hand (kind of like DA9 shifters from a few years ago), and then the rise quite a bit so that the top of the shifter is very high up....they didnt feel very good on a friends bike... maybe you have to setup the bars/shiftesr like Lance (shifters rotated far upwards)
Two details....I love the Campy quick release in the lever, not on the caliper, and more so I like the cleaner hidden routing of the cables up front.
But, you asked about ergonomics, which is exactly that: what fits one may not fit another....I think you said you work in a bike shop: so you certainly must have the opportunity to try both systems out: do it, see what you think.
Ergonomics equal, my instinct is if you buy Shimano you'll always think "should I have bought Campagnolo"; if you buy Campagnolo you'll just be happy.
Campy has the details down... I agree.
I have tried both out and I'm still undecided... Hopefully someone here can sway me in one position or the other... that's why i posted the question