I hate Shimano... for road bikes
I have Shimano on my mountain bike and LOVE it!
I have tiny hands. Nothing worked well when it came to Shimano for me, and I was not about to put a straight bar on my road bike... :eek:
I am a total Campagnolo girl... it is worth the extra $$$ to have the ability to grab my brakes with my hands firmly gripping the bar...
There is another difference in the comfort factor. If you examine both shifters closely, you'll find that the pivot point for the braking mechanism is mounted closer to where the cable is pulled on the Campagnolo. This means that when you are braking from the top of the hoods, it requires less leverage. I consider this a comfort issue because in the Northwest, if you're not climbing, you're braking. The leverage advantage to the Campagnolo means less work for your hands, so it's more comfortable.
The last thing that I would say about comfort is to compare the front shifting of each make. The Shimano requires that the brake lever be pushed sideways a considerable amount before the shift is made. The Campagnolo can be pushed a few clicks, then returned to resting, and then a few more to make a shift. This becomes a comfort issue if you have smaller hands than the average male that the shifters were all designed for. For people with smaller hands or shorter fingers, the Campagnolo is usually the preferred choice.
Another one in the Campy camp
My hands are a bit smaller than yours. Of all the bikes I've tried, my Campy shifters have been the only ones that fit me, though I did not get to try Shimano for little hands.