X3 on the personal opinion.
I have an auto and I love it, no 3 legged dance and I can do any speed from real fast to real slow.

2 downsides.
1 - if an A/T malfunctions on you on the trail, chances are you are really screwed. M/Ts dypically don't break it catastrophic ways, at least you can drive it.
2 - if you have a starter problem (I'm only sensitive to thsi b/c of recent issues myself) there is no way to get an A/T vehicle going (no push start, rope trick, etc).
Quick summary - for reliability - M/T.
For convenience - A/T.

With 200+ Billion electrical parts, the world most complicated machine is inside your own skull.

Question Reality.
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'89 Rnr DLX "SR4.5", 32s w/ 5.29 locked f/r blah blah