Blue Hippo Tang - are they all mean?

[Coralgurl]

I love my blue hippo tang but she's awful mean. She constantly picks at my trigger and has been chasing other fish around as well. I did redo my aquascaping a while ago but this behavior has not changed, and I am debating letting her go. Are all blue tangs like this or is mine just special? If I got another smaller one, would I have the same issue down the road?