Users complaining about the auto dimension spacing/alignment "feature", new users don't know, or remember to use the ALT key, plus if the model changes, the dimensions can lose their alignment, and you have to ALT key them back to life.
I've been looking for alignment, snap, space, etc. in the customer defaults, but nothing sounds quite right yet.
I doubt it. The alignment options seem to be saved in the user's dialog memory and/or the part file. Even if there were a customer default setting for it; it would only affect the initial setting in a brand new file. Once the user placed a dimension, the alignment options would be saved in their dialog memory file and would override the customer default setting anyway.