One of the main reasons as to why people really do this type of tattooing is because they want to unravel a story that they are trying to give off. For example, I have seen a famous soccer player that carries a full arm tattoo and his tattoo signifies what he loves, which is soccer and the love for his country.
However when you post a job for a custom tattoo design online you will frequently have 5 or more artists all bidding to do the work for you. Having more artists means you are more likely to find a tattoo artists that better fits with the style of tattoo design that you are looking for. Further more as we all know when people compete for your business you get better quality at a lower price.
Granted it is a little saggy and faded now but he still has one on his forearm nonetheless. So the whole tribal tattoo and the growth in interest for Hawaiian designs have combined to make a hot and growing market for Hawaiian tattoos. This is really an up and coming thing and it not huge yet. However many tattoo artists are spotting the trend and jumping on it already.