I'm a hawk chucker
https://www.youtube.com/watch?v=kruo_gxYeswCold Steel ones are okay, but need a little work to get them right and they always have that stupid hole where the grub screw was. I have two and the Rifleman especially took an enormous beating in two public have-a-go days, it survived perfectly.
My current fave is a very traditional trade axe style:
http://www.woodsmithstore.co.uk/shop/Products/Tools/Axes/Throwing+Axes/Product/T...On any trad hawk it is well worth checking the edges of the inside of the eye (where the handle goes through the head) and if the edge is sharp, blunt it well with a file. This stops the head from digging a 'step' into the handle that stops it from getting a good friction fit.
For throwing, a long round-shouldered bevel is best. This sticks much better than a short flat grind. It is a simple job to get a good bevel with a file, but try not to scratch side the eye as you do this. Some strips of duct tape to mask the head away from the edge helps keep it looking nice.