I am part Scottish and out crest is Stand Sure which is represented with an Oak tree. I have also felt close to that and the strength that tree's have so i wanted that apart of my body.
Really like the strength aspect of a tree tattoo as well. Yours looks great w/ much detail and shading. Plus I think that the lower leg is ideal for this type of work. I agree so much that I already have a tree similarly located. Nice Job.