Trees are very appealing: they vary enormously in mood and represent a challenge, with or without leaves. For the latter, the question is always, When do you stop drawing?
In the above case, the branch system was incredible, and I only stopped when it came time to have lunch.
Other times, reality has nothing to do with it. I've tried several variants of the above to represent Yggdrasil, the Norse world tree. The seven boughs are lucky no doubt, but the root system is in trouble. So was Yggdrasil.
And sometimes it is interesting to combine reality and fantasy, to give in to the temptation to endow a tree with human characteristics (or, occasionally, the reverse).