I'd vote for percula or ocelaris clownfish. Both have tons of personality. In fact, most clownfish do. Most blennys have great personalities as well, I'm a big fan of the bicolor blenny. I also like dottybacks, but I'd stick to fridmani since most others are nasty critters. Even P.fridmani can be a bit of a pain sometimes, but the personality is definitely there. Oh yeah, hawkfishes are great! I personally love the way they swoop and perch, look around, swoop and perch. Great fish.