So I started commuting yesterday on my used Cross Check that I've set up as a touring bike, with fenders, rack and brooks saddle. I had been commuting on my stock Bianchi Pista for the last 8 months, but we got rid of one of the cars, so I'm riding the bike as a primary means of transport.

I can't believe how different the experience is! The Cross Check feels like a tank, weight wise, but I don't have troubles getting up hills, due to the gears (duh). It feels more like a bike that is made for going long distances, which is what I got the bike for, but it still goes fast, just in a different way. I'll probably put the 23cm tyres back on the pista, so the contrast will be even greater. I'll mostly use the fixed gear for alleycats and recreational, while I'll be putting in most of my miles on the cross check.

Just some observations from the midwest...

I put more miles on my Specialized CrossRoads hybrid-touring bike than on any of my others bikes. I can load it down and pedal for miles on end with nary a problem with my back or hands. You just need to change your attitude toward the way you ride. When I was just riding road bikes I never took the time to actually look around at the scenery I was traveling through. Now I take my time and actually enjoy the scenery, the ride, and noticing stuff you never see when being a roadie on a road bike.

I commute on a Crosscheck as well. With fenders, pump, heavy duty rack with 28mm tires. And like you, it is a big contrast to my Bianchi Vigorelli road bike. However, riding the Crosscheck makes me a stronger rider. When I return to the Bianchi I ride like a bat out of hell. Kind of like, was it Vince Lombardi who made his football team practice in weighted pads so they would feel lighter on gameday?
Anyway, you get the picture. Also, I would suggest installing the Mr Tuffy Tire liners with some nice tires. It really takes the worry out of the commute. Yes, a weighed down Crossheck is not ultralight, but it gives you the confidence you will arrive to your destination.

The whole thing is reversed with me. I've been riding a CrossCheck for about a year now. Recently I put together my first fixie and in comparison it feels like it could float. I didn't think there would be that much difference.