Efficiency is fine. What's more important is striving for consistency. I recorded everything such that by my 10th all-grain batch I could do it by memory and get close to my expected numbers. I think one would prefer to always have a low efficiency than one jumping around from batch to batch. The unpredictability would be somewhat unnerving, if you are the sort to worry about such things.
Bottled: Old Peculier, Kumquat Kolsch, Dopplebock
Kegs: Amber Ale, Bitter
On Deck: Topaz IPA, RIS