I see Macs are very popular in the Python and Plone communities. Rails, too, has its fair share of Mac users. Lots of Java developers who use Eclipse/Tomcat/MySQL form a more even split among Windows/OSX users. Linux/BSD notebooks don't seem to be as common on Java-related FLOSS events than in other similar events.
I prefer Linux. Actually, I would be happy with any Unix-like OS with proper system-wide binary package management and a modern GUI. I can live with the occasional quirk when some part of the computer cannot function properly because it was never properly documented. I know that, by the next OS release (right now, that will be in about 4 months), it will.
Also, BtrFS is very interesting (although it doesn't compare to ZFS, but that's another can of worms)
I prefer Linux. Actually, I would be happy with any Unix-like OS with proper system-wide binary package management and a modern GUI. I can live with the occasional quirk when some part of the computer cannot function properly because it was never properly documented. I know that, by the next OS release (right now, that will be in about 4 months), it will.
Also, BtrFS is very interesting (although it doesn't compare to ZFS, but that's another can of worms)