I agree with the added fear factor of mixing with microlights; my biggest scare to date was arriving at a small airfield's circuit on my first post qual flight to find that 20-odd french microlights had also chosen it as their destination
I allowed myself to put too much of my attention into looking out (they all seemed to be aiming for the runway at various heights and from half a dozen different directions) and let my speed get horribly low. Had to leave the circuit for 10 mins to regain my composure, and by the time I returned, most of them were on the ground and sanity was restored.