Which filesystem do you use on portable media?

An anonymous reader writes: Most people use MS filesystems on Disk-On-Keys, and portable hard drives, as these are readable from most machines. But this way you loose the files' permission information, which many times is very inconvenient(you must agree that having Ubuntu asking you whether to execute or display every text file or image you open from a DOK is annoying). Using "regular" Linux filesystems like ext keeps the permissions, but may require using the superuser when switching machines (as the UIDs are different). So does any of you slashdotters have a creative solution for this problem?

FAT32. Just use it and not worry?

[w0mprat]

If permissions are a pest, does it matter what fs is used? FAT32 is the most widely supported, everything can read it, performance is not too bad, the limitations are not too much of a headache (yet). exFAT is promising with peformance but poorly supported.

It'd be nice to use EXT4 or something similar full time on external media. I do have a linux firewall installed to a USB key formatted with EXT4. But the only other time I can recall I had a need for for anything but FAT32 was working with a Android ph