So, i've noticed over the years I've spent wandering this fair isle that some professions seem to attach people who all have the same voice. Tone, delivery, dunno. But it's all true..

Local Radio DJs (accent can go regional when you go further though)
Fairground Ride Operators
Paintballing Stewards.

Paintballing stewards are my favourite. They all have that same safety demonstration speech. "see this, it's a paintball. it travels at 80 mph, if it hits you in the eye it WILL blind you, so if I see ANYONE with their masks off you WILL be asked to leave the game. IF you do it twice you WILL be asked to leave the site for the day".

Any more examples, weekenders?