I love my MacBook (2008, aluminum, Intel processor with the low-end nVidia chipset). I don't like running Windows. I don't want a Windows Bootcamp partition, because I found I never used it. (I really only used it for Oblivion, and even then stopped eventually because I enjoyed it more on the XBox, and hated the reboot-into-Windows process.)
I'm using WINE to run Fallout and Fallout 2, with great success. I also have the Steam client, which I've used to get Portal and a second copy of Civ IV (+ addons, mostly so I didn't need the DVD with me).
What I want to know is, can I buy a Windows game from the Steam client for the Mac, and then run it via WINE? If so, do I need to take any special precautions? (For instance, my current
winecfg emulates a 640x480 desktop to enable Fallout and Fallout 2.)