Lionfish are great but the personality mostly shows up at night when they "hunt." For me, my Lion tends to stay put until the lights are off.
My favorite fish would have to be a Clown Trigger, its just ashame that I can't fit one into my tank. I love aggressive fish, I already have a Dwarf Lion and might add an Angler soon.
50 Gallon Acrylic Tank (36x15x20)
85lbs Fiji Live Rock
(4) Maxi-Jet 900 (230gph) *Awaiting 2 MJ1200s*
(1) 250W 10,000K Aqualine Aquamedic HQI Hanging Pendant
(5) LED Moonlights
(2) Pink Skunk Clownfishes
Goldstripped Maroon Clownfish
Yellow Eye Kole Tang
Fuzzy Dwarf Lionfish