Spikey hair look
Tell your barber to use the clippers on the bottom side of your hair and start off with nothing less than a #3. Anything shorter than that is not going to look good with that style cut. Once he has cut the bottom side tell him to blend in the sides to the top, but leave enough hair on the sides to be able to start spikes. You should also tell him to razor cut the top or your hair. (he will know what you are talking about) If he doesn't know, then you need to get another barber. The razor cut will leave a texture in your hair that will allow it to spike really well. Then go and get you a tube of "Ice Spiker" it is made by a company called Joico. It is the best shit on the market right now for spikey hair.
Peace