Back again!...not yet. I'm one of the (MCNs) hated "long-term learners. Been commuting on a 125 for 6 years

, finally doing a long enough commute to warrant a bigger bike and i've wanted a Tiger since i first saw one. Just recently re-done the CBT, and passed the theory test (I think this is very useful, although probably more for people with relatively little driving experience and i've been driving for 18 years as well as 6 yrs finding my feet on the mini bike).
I'm going to be training with a mate in April, and we are going with a local guy who comes highly recommended...not cheap, but recommendations are everything in this game!
How long have you been an instructor for? Any words of wisdom (things most people cock up would be good!!)