Alright, maybe it's just me, but personally I don't touch any filesystem that isn't years old (or heavily based on one that is years old) or that can't easily be recovered in some fashion to a working filesystem. Data loss is one of the killers for me when it comes to computing... the best solution we have so far is "make copies of it everywhere", which is hardly technical.
I am more than happy to use FAT32 on a hard drive if I know it's going to be used for basic data storage and not much else. I have FAT32 partitions still on my Linux servers. I always have the safest ext? filesystem on any partitions that I boot from or need linux permissioning on. This, at the moment, is ext3. Give it a couple of years and it might be ext4. In the absence of either option, I would choose ext2.
NTFS is an overly complicated solution to certain problems but the fact that I now have read-write safe tools that run on Linux too also starts to fold this into the "useable for certain purposes" area. (I never even *touched* CaptiveNTFS because it was such a hack, something was bound to break).
However, ALL other filesystems, whatever their origin, are to me nothing more than experimental versions that I don't consider my data safe on. I admin school networks for a living and if I lose data in any way, shape or form, it could easily prevent the school from opening that day (you have no idea how much stuff runs off school systems now) - that would be my job out of the window.
So, obviously, we have backups galore and nice seperation between systems but do you really think that ANYTHING is going to go onto a filesystem that I can't read back in Linux and at least have a stab at fixing? I'm wary even of read-write drivers for the filesystems I trust that don't have an established history.
ext3 > ext2 > FAT32 > NTFS > anything else
at the moment, with ext4 languishing in the last category until it becomes a mainstream hit.
Special purpose filesystems? They're for special purposes and you run your own risks there. And to be honest, for 99% of stuff, one of the above would do just as well.