Just a random thought prompted by some of the posters on instructing hours versus charter hours.
As you are probably aware, CASA has a number of discussion papers out and about at present. One of the proposals is for a far more structured form of check and training for charter organisations. Another is that anyone doing check and training is to have instruction qualifications.
Depending on what you ultimate intentions are, you may want to consider getting an instructor's rating. If you are going to be in GA for some time, then it may well be worth the effort. If big shiny noise makers are the ultimate, then it probably wont matter.