Unless you have a certain problem with something, I would say you got lucky. However, if you "get" a problem of some kind in the future, you may attribute it to the dug use, but somehow I doubt that after ten years-You would know by now.... =)
Coming from one recovering addict to another this also is something that I fear. I have done so much reading regarding this and haven't found no real answers either. But I keep reading!!! Try to google WHAT ARE THE LONG TERM AFFECTS OF METH USE and see what comes up? Maybe that will help?
Good luck to you and congrats on stayin sober!!!