Questions on EXT3 vs standard BSD partitions

[Jim Stapleton]

I have to move between BSD and Linux on one system quite a bit, and I
was wondering if there  were any reasons to avoid EXT3 on a filesystem
(such as /dev/ad0s1), as opposed to using the more standard BSD setups
(such as UFS on /dev/ad0s1a)? I'm thinking mostly in terms of
reliability, but also in terms of flexibility and speed.

Is there anything that should absolutely stay in UFS (such as /boot?)

Thanks,
-Jim Stapleton