100% user preference. Some folks say "its cheating if its auto" but they are FOS! I have always driven a manual YJ and still love it when im back home (Ohio), but I'm in busy cities living 6-9months out of the year and a manual in Los Angeles is like putting ur face on the stove and telling ur friends u like it because its warm. You're lying to urself and everyone else.
On the trail an auto is nice for those certain stall out moments, or burn up a clutch, on a steep grade.
But even then, some guys love it on the trail too. Again its just user preference.