If you want a fish with personality, don't buy a Hippo Tang.
Despite what Disney portrays, Hippo Tangs hide a lot (for a tang), and they are usually quite aggressive compared to many other tangs. I have an aquarium service company, and many clients have bought Hippo Tangs - most of them get to 5-6" within 18 months, then grow slowly after that. One client has one that's only 2.5", and it's been that size since I've been cleaning the tank (3 years).