I don't get the comparisons to Kamina. Kamina would be a big mouthed cocksure loon regardless of audience, or fame or accolades, and tends to get in over his head and barely get by through through luck. Blackstar wants attention for attention sake, and cares more about making a ruckus than yknow...anything else. He'd probably commit suicide if he turned invisible and mute.
I like this show, but I'm worried that once it starts getting more serious that the bottom will fall out from under it. Doesn't seem like the type of setting/characters that could support even a moderate bit of drama... but are great for fite scenes, T&A, and slapstick