Plant's Personality

Trees are individuals, just like people. And sometimes there are thousands of the same individual, for plants. This is not in reference to a tree's shape, or the history.
From a handful of japanese maples seeds I have maples with red bark and with green bark. I have leaves with very pronounced lobes, some like Canadian flag, others have 3 lobes instead of 5.
From another batch of seedlings, I have one tree which is very sensitive to dryness compared to its siblings. It will droop at the slightest provocation, though its growing conditions were identical (until I learned it was different). By the way - it is not more thirsty, it just wilts faster.

I am wondering how to incorprate such details into my bonsai.