Hi Steve,
Maybe you'll like it so much (it might feel natural to your hands, or you like the the image quality, or you like the weather proofing with an appropriate lens) that you will explore new subjects that you never thought of before, who knows?
It's worthwhile to look at Benjamin's pictures. His work is conceptualized in advance. He has a huge team he assembles for every technical and beauty aspect. The lighting he does sometimes with simple light bulbs. The camera? That's almost the very last thing. I searched it out previously, but in one shot, it's the Canon rebel he used. For much of his other work its the Pentax K10D that you already own!
I still love the Pentax lenses and have my trusty Spotmatic with my one lens. I did buy a used telephoto but never got to use it ever! I just photographed everything with the 50 mm. So when I used the 1DII it was a major piece of heavy gear for me. As Bart points out, the "heft" does feel good to the hands. Moreover, with a 70-20 2.8L the balance is wonderful. I never used the camera for sports or for birds but that would be great as the 1DII is a fast camera in getting focus and tracking. The 1DII N is the ultimate "standard" against which Rob Galbraith tested hundreds of times the ill-fated 1DIII in
focus tests, to find out why it couldn't track players on a sports game! The report is an obsessional, driven, beautiful, thorough and devastating series of 23 pages that pretty well marked the 1DII for a fast replacement, LOL!
The shutter on your 1DII is good for over 100,000 shots and it can be replaced! One needs 3 MP , (See Neil Turner's breathtaking portraits and tachniques at his generously educational
DG28.com. He used the Canon 30D and it served his editorial work with aplomb.
The 1DII with 8MP and 8 frames per second, is one of the peaks in Camera technology. Your recently acquired 1DII N is an improved model with a larger screen. So you have a great camera at a very good price.
Still, look at the work of Pentax owners and explore what
you want to do. Then plan the picture as Ben does or roam the streets or even look at the puddles and crevices like tom Robbins and you'll find new life for the Pentax K10D.
The Canon 1DIIN still is a king in it's class. There's mostly no need for any other Canon sports camera, except for low light work where the new high ISO capabilities are revolutionary. Maybe you'll fall in love with it too! Here's it's legal to have a lover on the side!
Asher