I have a one spot in my reef and he's so much fun to watch. First on the scene when I come around with food and the first to flee when I blink my eyes. Sometimes it doesn't matter what you feed, fish will nip at things and develop a taste for something or they simply don't get enough of what they should and "stray" away. I feed my tank several times a day, nori being one of those times, so most of my grazers are well fed, but they still graze throughout the day. Keep 'em fat and healthy and hopefully they'll be model citizens? With that being said, you can describe a fish in general terms regarding behavior, but each fish has his or her own personality and that can change, just like we change.
Go for it, but be careful of the spines and keep them well fed. Good luck! I'll try to post a pic of my one spot (my son named him Jupiter). Btw, they grow quickly when well fed, so be prepared.