I agree with Glendalgoon
I would ignore the comment about ''don't instruct unless you want to be an instructor"
Theres a few heads of training out there with the attitude either 'Instructor for life or not at all' in my view they are taking an over simplistic view of instructing and in the process passing up the chance to employ some good instructors who also have other interests in aviation commercial ops ect. The skills they gain from other forms of flying are invaluable in instructing.
I think the best instructors I've met so far have gone onto other flying GA/airlines but also continued to instruct because they have a passion for aviation and enjoy helping others realise their own potential.