The thing that gets me is clients who change their mind about shape / length when you have finished the set. It happens very rarely as I am sure to have a very good consultation with them, but once in a while they just change their mind.

I also hate it when clients "flick" the newly applied tip before any product is on it and scratch their nose or touch their hair.

I find lots of clients start to lift their hand in an unconcious attempt to see the process better whilst I am applying product.

However, my Father always says that running his business would be wonderful if he could just avoid having any staff or customers!